Use your lunch hour
If you work, make your lunch break your designated time to exercise. "My company has an on-site fitness center, so I try to hit the gym for a 30-minute workout three times a week. On those days, I bring my lunch and eat at my desk," says mom Sara Schmid, of Atlanta. If you don't have a fitness center nearby, keep a pair of sneakers under your desk, grab a coworker, and climb up and down the stairs in your building.