It is vital that you eat a balanced diet. Do not avoid certain foods. Avoid missing out on carbohydrate in the evening if you are training hard as you need to replenish glycogen stores and help repair of muscles. You need to consume approximately 50g of carbohydrate within 20 minutes of completing strenuous exercise to help the recovery process. Enzymes responsible for making glycogen are most active at this phase and will replace depleted glycogen stores. Also you will need to replace fluids lost by sweating. Eat a good balanced meal within 2 hours of your exercise session. 

If you are looking to loose weight, try these few tips:
1. Cut down the amount of alcohol and sweets in your diet. 
    These are empty calories with no nutritional benefits.
2. Reduce your plate and portion size, and make sure you have two thirds of your plate filled with vegetables.
3. Look at when and why you eat. Try to understand why you
    are eating sweets or crisps and look at replacing these
    foods with healthier alternatives.
4. Eat a balanced diet that includes variety, whole wheat
    grains and always eat in moderation.