consume about 1200 calories more then you normally would (About 4500-5000 calories). Weight gainer is always a good help if you can't eat much but make your diet a clean one. You don't want to gain weight by eating nothing but junk food or high in saturated fat. big breakfast, snack, lunch, snack, dinner, late snack. www.bodybuilding.com they have great information. if you need anything just pm me. i lazy to type lol!