Lisa Lillien "Hungry Girl"

Keeping weight off isn't easy. For some reason it goes on way faster than it comes off. (That sucks, doesn't it?) But if you've lost a few... congrats! I think the best way to keep weight off is through exercise. Exercising is great because it not only burns calories but it keeps your metabolism up too. So even if you have to trick yourself into exercising, do it. Walk around the mall, dance around the house, take the stairs instead of the elevator, grab a friend and go for a hike. Every little bit counts... burn, baby, burn!

For more from Lisa Lillien, go to hungry-girl.com.

Liz Neporent, MA

Hopefully, you kept a log all during your diet so you have a record of the lifestyle changes you made. If you did, you have a working blueprint of what has been successful for you. When you find your resolve weakening, go back to page one and repeat the plan. It worked before, so there's no reason it shouldn't continue to work. Even if you haven't been tracking, start now. Besides giving you written proof of your efforts, keeping a diet and exercise diary can be motivating in and of itself. And it can keep you honest. No one wants to see zero minutes of working out written on a page, do they? If keeping a log isn't your thing, consider joining a workout group, hiring a trainer for a session or two or changing up your workout and eating plan to something new. Any fresh change can help keep you interested.