Form a workout group: When you exercise with others you're more likely to stick with your fitness program, studies show. The camaraderie and accountability of, say, a walking club can keep you motivated. Don't have time for that? Round up other moms sitting on the sidelines at a youth soccer game for a few laps around the field whole the kids are playing.
Squeeze in exercise on the go: Use the time you spend waiting or standing every day to do a few easy moves. You'll burn more calories and tone up faster. Try some squats while brushing your teeth or tone your arms while sitting at the desk.