Give yourself permission to enjoy your favorite but fattening foods in moderation. Completely denying yourself is a sure way to sabotage your weight loss plans. Instead, have a small slice of cheesecake as a reward or treat. By sampling your favorites you are less likely to give in to the urge to binge on fattening foods.
Find a friend or family member who also wishes to lose weight and work together toward your goals. You can set up a competition for who loses the most weight, or exercise together, or take turns preparing meals in double portions so you both have more time for other weight loss endeavors.
In the end, listen to your body. Pushing yourself too hard is a road to failure, but giving up on your commitment will also get you nowhere. Find what's right for you and stick to it and you'll thank yourself in the end. There's no downside to living a fuller, more energetic life.