A simple goal might be to try a new fruit and vegetable each month. Balance what you eat with physical activity over several days. Don't worry about one meal or one day. If you overeat or don't exercise, adjust and make trade-offs over the next few days. Denying your cravings can actually make you eat more of everything else.
Moderation is the key.
When eating out, consider splitting an entree or dessert with a friend. Take time to enjoy the meal rather than rushing through it. Remember, you can enjoy all foods. Just be sensible about it. Find ways to fit physical activity into your everyday life.