Here, our panel's top stick-with-it tricks:
Heed the 10-Minute Rule
Forget the all-or-nothing attitude toward exercise and you may never miss a session. "When you're not in the mood to work out, tell yourself that you'll do just 10 minutes," says Jay Kerwin. "Once you get going, you'll remember why you're there and probably stick it out for a full routine."
Originally published in FITNESS magazine, October 2008.