Start eating like a cheap Viking at a all you can eat buffet. Seriously, the best way is to eat foods that are both high in carbohydrates and high in fat. example: something with a high sugar or flour content and contains fat from oil or dairy. Milkshakes, Pie, any fried foods that have a batter coating,lots of pasta, hero sandwiches on large rolls with mayo and so on. If you dont gain lbs. with that diet, you have either a thyroid problem or you are truly blessed.