7. Watch the Clock

7. Watch the Clock

Your body clock, that is. Try to work out at the time you have the most energy, suggests Jason Theodosakis, MD, exercise physiologist at the University of Arizona College of Medicine. If you're a morning person, schedule your fitness activities early in the day; if you perk up as the day goes along, plan your activities in the afternoon or evening.

"Working out while you have the most energy will yield the best results," Theodosakis says