Q: I'm a small guy when it comes to weight.... i want to gain muscles and gain mass. how would i do it?

A: You'll need to have a good heavy whole-body weight-training program and, even more importantly, a good nutrition program which will have you eating A LOT! Without a lot of food, you'll never gain a lot of mass. How much is 'a lot of food' -- enough to have you gaining about 2 pounds of weight per month. If you gain weight much faster than that, then much of the new gains will be fat (probably not what you want). By sticking to a 2-pounds-per-month pace you'll ensure maximal muscle gains with minimal or no fat.

Please read my Weight training article and my Nutrition article -- they will give you the knowledge base you'll need to proceed. Then fill out Mike's Fitness Guide specifying 'Gain Muscle' as your goal -- it will give you a complete exercise and diet prescription. For the exercise program, you'll need to find a gym to join or at least buy some equipment (pullup bar, dumbbells, maybe a flat bench) for home. Read the couple of paragraphs above the diet suggestion carefully -- it'll tell you how to go about modifying the suggested diet. Remember your goal is to gain 2 pounds per month. If you're not gaining fast enough, increase portion sizes slightly and if you're gaining too fast, decrease them slightly. Good luck!