The Sister Study is a clinical trial that is now enrolling patients to determine what environmental factors and genes play a part in developing breast cancer.

Researchers want to find what causes breast cancer, and through understanding this they can work to prevent the disease altogether. There are some known factors to contribute and or prevent the development of breast cancer -- diet, exercise, hormone therapy, breast-feeding and smoking. However, the prevalence of the disease suggest there are other factors at play that we are not aware of at this time.

Women who fit the following criteria are urged to enroll in the Sister Study and join the fight against this disease:

• A sister related by blood, alive or deceased, diagnosed with breast cancer.
• Ages 35 -74 years.
• Living in the United States or Puerto Rico.

The Sister Study is being conducted by the National Institute of Environmental Health Sciences and will be evaluating women from all backgrounds, occupations, races and ethnicities to attempt to identify environmental and genetic factors that may be associated with affecting the risk of breast cancer.

You've surely known kids whose parents smoke declare their repulsion for the habit. The health risk, the expense, the filth of smoking seem to deter many youngsters from following in the footsteps of mom and dad. Theoretically, anyway. In practice, these same kids may fall prey to the very act they vowed to reject.

How about kids raised in households filled with sugary snacks and drinks, foods packed with fat, salt, and calories, and parents with expanding waistlines? Seems only natural these children, despite good intentions, end up struggling with healthful eating and weight management.

We are what our parents teach us. It's all we know for a good many years. And by the time we are able to make our own independent decisions, it's often too late. Our parents' actions and values are already programmed within us -- and it takes hard work to switch things up.

So here's my plea for this Sunday morning: do your kids a favor and become a positive role model. Don 't just tell your little ones what is right and healthy and virtuous -- show them. Let your behavior be the gold standard now, so that later, it's likely to be what your sweet babies will fall back on.

Here are seven ways to get started:

Feed 'em well
If kids learn healthy eating habits early, they're likely to stick with them. Offer whole grains options (rice, bread, pasta) and snacks that are not in the junk food group. Don't even buy the stuff you may later wish to clear out of your cupboard. Guests at our house are offered two drink options -- water or milk. Why? Because if we have juice (it's loaded with sugar) or soda (also sugary and calorie-laden), our kids just can't hold back. But if we don't have these beverages, they are never an option. Out of sight, out of mind.

Keep 'em moving
Take your kids to the park, get them running around your backyard, take them swimming, organize a kid-friendly football game, invest in a kite. Quiet activities are also good -- and necessary -- but when in doubt about how to entertain your busy little bees, make them move!

Let 'em see you sweat
You need to keep moving too. Not only for your own well-being -- that's obvious -- but so your kids see your physical activity as a staple of healthy living. Teach your kids to do push-ups and sit-ups and do them together. Jump rope, run laps at a local track, ride bikes, or dance. Just don't expect your kids to stay active if your idea of exercise is flipping through TV channels.

No TV
Turn off that TV. Rid your household of junk-food commercials, mind-numbing content, and addictive inactivity. Let TV be a treat -- a small one -- and not an expectation.

No smoking
Need I explain? It's unhealthy, costly, dirty, and a sure contributor to cancer. Try with every ounce of your being to keep this habit away from your impressionable children.

No stress
Some stress is unavoidable. Some is even healthy. But the kind of stress that hurts our tummies, gives us headaches, and threatens our health should be minimized. We must do our best to control our own stress so its effects don't spill over. And we must teach our kids how to cope too. Fortunately, some of the techniques listed above also work for this category -- physical activity, for example, does wonders for lowering stress. We can become experts at deep breathing -- have your kids practice with you. And we can teach a bit of distraction. If homework is making kids crazy, go with them on a short walk where they can regroup and return to the task with a clear head.

No double standards
We simply cannot say one thing and do another. Smoking while preaching the dangers of the habit just doesn't make sense. Saying "no" to sweets with your hand in the cookie jar is downright unfair. Carrying around extra weight and demanding physical fitness is simply ineffective. So make a commitment to yourself and your kids that you will do as you say. It's the only way.

Jack Nicholson has been serving up a steady stream of cheer for cancer patients at the Cedars-Sinai Los Angeles hospital.

The Hollywood icon and Oscar winner has been visiting terminal patients and cheering them up with jokes, card games, and behind-the-scenes stories about his career.

Nicholson's next career move comes in the form of a movie called The Bucket List. He plays a dying man in the film and began spending time at the hospital to research his role. But once his film finished, Nicholson kept visiting. He was that touched and moved by the patients.

Hospital staff say the actor's visits do wonders for the patient spirits. The only down side is for Nicholson who finds it hard to leave, knowing he may have seen some of his new friends for the last time.

When she asked her teenage daughters whether or not she should accept the American Cancer Society's Mother of the Year award, the response was a resounding, "Mom, of course." So Sarah Ferguson, the Duchess of York, accepted the anti-cancer honor this week and told ABC's George Stephanopolous on Sunday why she is a good mom and a healthy role model.

"They see that I go running, I get on my bicycle, I do yoga, pilates, whatever else I do," Ferguson said. "Do you know what they do? Get up off the sofa, turn the television off, walk to work, walk around the block, more vegetables, more fruits at school, less soda pops, less fast food."

Ferguson, 47, says cancer prevention starts with good role modeling -- which is exactly what she has done as mom to princesses Beatrice and Eugenie.

"I can safely say one of the best things I've done is be a good mother," Ferguson said.

Ferguson, author of memoir My Story and spokeswoman for Weight Watchers, first became known as the wife of Britain's Prince Andrew, the Duke of York. The pair divorced in 1996, but Ferguson's positive public persona has remained untarnished.

CBS 60 Minutes newsman Ed Bradley lost his life to leukemia on November 9, 2006. And ever since news of his death reached the world, reactions have been overwhelming -- and like nothing correspondent Lesley Stahl has even seen.

"I've been around here a long time and there was a quality of reaction from the public that was personal in a way I can't explain and everyone here has had the same thing," she said. "We have all been flooded with e-mails."

Bradley was the king, says his former correspondent Bob Simon. "He had the most authoritative presence and style on the broadcast and that's not replaceable," he said.

Faced with the huge loss of Bradley, CBS won't even bother to replace him in the middle of the TV season. Instead, his workload will be spread around -- a unique arrangement for 60 Minutes -- for as long as it takes to find the next full-time person armed with the ability to take on Bradley's correspondent role.

Bradley's death also robs 60 Minutes of its only on-screen black correspondent. And while it's important to represent diversity, the powers that be believe it would be a mistake to fill the spot with someone just for the sake of addressing the issue.

So those at CBS will just wait for the right person to come along -- while they collectively grieve for the right person they just lost.

In space, zero gravity causes hair to increase in volume, get curly and float. A woman astronaut with long hair is encouraged to pull back their hair into a ponytail. Astronaut and Navy commander Suni Williams had a plan before she left Earth on the current space shuttle mission, to cut her hair and send the ponytail back to Earth on the Space Shuttle Discovery to be made into a wig for a cancer patient undergoing chemotherapy.

To state this woman is awe-inspiring is an understatement. In the ABC News Ponytail in Space report, when asked if she is a role model for young girls, Williams is quoted as saying, "I hope so. I wasn't always the sharpest tool in the shed, the smartest kid on the block, but I think there was a lot of persistence. And I hope kids understand it is OK to fail, if you learn something from failing. Maybe you don't get the first thing that you want, but if you are good at what you do, and you try hard, some things sort of fall into place. If you want something, you can obtain it."

I would say the courageous, determined and spirited Williams is a heroic role model for everyone, regardless of gender or age. According to the report, the smart, tall, willowy brunette with a wicked sense of humor, and zest for life was dancing to Bruce Springsteen's Born to Run before she climbed into her spacesuit for a grueling 7½-hour spacewalk on Saturday.

To view the online news video for this story, visit Space: The Haircutting Frontier.

When the First Lady of Surfing, Rell Sunn was diagnosed with breast cancer at the age of 32, she was told she had months to live. She lived each day as if it were her last -- with complete passion and compassion -- and lived another 15 years.

When I posted that each year during the Luau & Longboard Invitational event to raise money for the Moores UC San Diego Cancer Center, the Rell Sunn-Queen of Makaha Award in memory of Rell Sunn is given to honor the person or organization that best displays the qualities of compassion, unselfishness, aloha spirit and dedication in the fight against cancer -- I went in search to learn more about Rell Sunn.