I try to follow a diet of 30% fat, 30% carbs, and 40% protein. Most of that fat should come from mono/poly unsaturated fat such as fat from nuts, fish, avacado, and a few cooking or supplimental oils. You might want to suppliment with a tablespoon of flaxseed oil, which you can find at GNC, etc. Try to eat as few saturated fats and especially transfats as possible (anything hydrogenized such as margerin, non natural peanut butter, and crisco is going to contain transfat). Carbs should come from whole grain bread (not just "wheat bread"), brown rice, pasta, lots of veggies, and one or two pieces of fruit every day. Fiber, which contains no caleries, is very important - you should have about 35g of fiber a day. Don't eat carbs later than a few hours before bed. Protein should come from chicken, turkey, eggs, fish, and only the leanest beef and pork you can find. Solid animal fat is saturated fat, which you don't want. At your size I'd shoot for roughly 2000 caleries a day. There are 4 caleries in a gram of protein and carbohydrate (other than fiber which has 0), and 9 caleries in a gram of fat. Suppliment with multivitamins every day and take it with food. Try to drink 2/3 gallon or more of water every day. Cheat once a week, it prevents binging.
Do medium-high intensity cardio 3 or 4 days a week (first thing in the morning before eating ANY food is best), and weightlift 3 days a week to maintain muscle. Immediately following weightlifting, I recommend taking 400 caleries of dextrose and/or maltodextrine - they're very sweet carbs that you can find at GNC in powder form. This is in addition to your regular diet and will help with muscle maintenance and reduce soreness.