I'm a good runner when it comes to the right state of mind and the right weather. I have to feel a spark of motivation to know I'll succeed at running, and I prefer cool temperatures. Something in the low 70s or below is perfect. When it's hot and steamy and humid in my Florida town, I tend to struggle. Like I did today.

I set out for a three-mile run with my head in the game. The air was a bit too warm for my liking, but I pushed myself anyway. For a good long time, I did well. With loud music blaring on my MP3 player and a steady pace, I conquered about 75 percent of my goal. Then something happened. I felt my body slow, and my feet wanted to stop. They almost did. Instead of giving in and giving up, though, I pushed myself to finish. In the end, it felt good.

My advice to you today is this: just when you feel you are fading, fading, fading -- don't quit. Try to get through the moment and you'll likely find some energy to keep plugging away.