Too tired to exercise? Well, one of the best ways to muster up enough energy to start exercising is to start exercising. A bit of a Catch-22, I realize that, but it's not all too difficult to get around it, either.

Self magazine, citing a journal article published in Psychotherapy and Psychosomatics, reports that when persistently tired sedentary people casually biked for 30 minutes three times a week for six weeks, they experienced a marked increase (65 percent) in their energy levels.

To overcome your initial exhaustion, do what the people involved in the study did: start off easy. Then, as your energy levels climb, increase the intensity gradually over time. Before long, you'll find that you have plenty of gas left in the tank at the end of each day for a solid workout.