It's a bit tough to tailor a diet since people have different needs, but Here is my 2cents from another thread:
Stick to simple, natural foods like beef, chicken, eggs, fish and fibrous vegetables.
Aim to get 1 gram/lb protein.
Supplement w/ fish oils, olive oil is good as well, use it to cook food in place of other oils.
Also, make sure you take a multi, and supplement with zinc.
There are numerous ways to diet, pick what you can stick with. The two common diets are low fat, and low carb. As of right now i'm doing low carb w/ketosis. Here is what I eat usually:
Breakfast: 4 whole eggs, raw if i'm in a hurry. Multi, zinc.
Snack: Sharp Cheddar, about 6 one-ounce cubes.
Lunch: Cut of chicken of some kind (usually 2 servings of thighs/drumsticks since they're cheap), and fibrous vegetable (usually steamed spinach)
Next Meal: Probably the same as lunch or either that more raw eggs.
Dinner: Beef (Pot roast is cheap, takes some time to cook tho), with mushrooms and mashed cauliflower. Or tilapia with steamed broccoli and asparagus. Finish off with psyllium husk drink and fish oil capsules.
I've been doing this for 3 1/2 weeks and i've had some good success. I also don't use protein powder, no bias against them I'm just not willing buy any. But if you have some make sure they don't contain fillers like maltodextrin or dextrose, or unnecessary sugars and starches. Also if you drink diet drinks, see if citric acid affects you. And on weekends I add in a refeed meal to keep me sane. This meal consists of carbs, with little fat. Hope this helps. Others will probably answer in a little bit.