I need to start eating healthier to lose weight. But I don't know how to start. I need a diet that I could do in the long term for a healthier lifestyle and that will help me lose weight every week? any ideas?

Buy "You: On a Diet" by Dr. Mehmet Oz. It is the best and most comprehensive guide to eating healthy and losing weight that I have ever read. You might also try the American Diabetes Association. They will have the food groups, etc on the website. The best advice is to divide your plate into 4ths. 1/4 of your plate should have meat , 1/2 of your plate should have vegetables and 1/4 should have carbs. You should eat a lot of green leafy vegetables and have a helping of dairy at least once a day. Just use common sense, that should do it.

take your current body weight and multiply it by 7 and that will give you the ammount of calories you can eat and lose weight, remember to adjust it as your weight drops, this formula was given to me by my doctor and it is also the formula used by the Biggest loser tv show, Good Luck!