1) Work out. This means LIFT WEIGHTS. Not running, not jogging, no treadmills. Actually, LIFT WEIGHTS. Use the Nautilus machines, go to the gym, go often, once a week at least. And when you lift, don't lift heavy, lift SLOWLY. And lift evenly - use all the machines, not just the bicep machine. Don't use Creatine - it's a huge waste of money because you won't lift nearly as often to make it worthwhile. Protein mixes are fine if you can tolerate the disgusting chalky taste. I never use them and I'm looking just fine. Muscles are made of microscopic fibers. When you contract your muscles, to lift weight, the fibers come together. Then when you release weight, those fibers pull apart leaving microscopic tears in the tissue. As your body repairs those tissues, your muscles grow. So the important part of any exercise is not the lift, but the release. Release agonizingly slowly. Count to two when you pick up. Count to four each time you release. Work opposite parts of the muscle. 12 reps of biceps, 12 reps of triceps. etc. 2) Eat. Eat a lot. Often. To gain weight, you have to eat. You should eat six times a day. That means protein. Protein builds muscle. That means chicken breast. Turkey. Fish is okay. No hamburgers. Eggs are fine. If you were watching your cholesterol it would maybe be bad, but you are not, so go ahead. Also complex carbs. That means always whole-wheat bread. Never white. Oatmeal. Two vegetables a day. That means one salad, one steamed vegetable. Olive oil, sunflower oil and canola oil. Nuts. Raisins. Lots of fruit. After you work out, you have a half-hour window where your body needs protein. You have to eat as much as possible in that window. If you eat healthy a LOT and work out steadily, you will start to look really really good. Even you.