Something you probably already know is that putting on pounds isn't done easily. Large portions are the key to gaining weight. You have to eat big, to lift big, to get big. Speak that phrase to yourself repeatedly until it is completely understood.
A lot of people think weightlifting is the key to gaining weight, and I won't argue, it is an extremely important part. But, there is another thing that is just as important when it comes to how to gain weight, and that is your diet.
Tally up all the calories that you take in on a normal day. Count your normal caloric consumption without changing a thing. This step is vitally important, so try for the greatest possible accuracy.
The day after you tallied up all your calories, eat 500 calories more than you usually do. So, lets pretend that the day you counted calories you counted 2000. For the rest of the week, you would now eat 2500 calories a day. The best way to meet your caloric requirements without exceeding them is to carefully split your caloric intake into 5 or 6 small meals a day. Forget the 3 square meals myth, and of course, don't just "graze" all day. A mindful 5 or 6 mini-meals will meet your needs and keep you satisfied. Eat one meal every 2 and a half to 3 hours. Make sure that the added calories in your diet are from healthy foods.
The key to obtaining muscle mass is protein. It is impossible to gain muscle without sufficient protein because weight training requires the use of amino acids, which are derived from protein. You should daily eat about 2.2g of protein per kilogram of your weight. Eat foods that are high in protein. Ideally, you should receive your protein from foods and not supplements.
Some people think that drinking beer helps gain weight. But it is not true, it accumulates in your abdomen, making it fatty.
One of the best ideas is to go to a gym and lift some weights. This is also a crucial part of increasing weight, so be certain you perform this properly. Some thin people think that exercise is not good for them. This is false, this will keep metabolism high. Don't think that food will do the job alone. If you excercise you will gain lean mass not fat, thats why excercise is so important.
By increasing your muscle with resistance training, you will also up your metabolism. One must learn the difference between weigh gainin and weight loss exercises.
Wanting to change your body, you'll have to understand all the factors working together that will propel your goals and then you'll see a dramatic change.