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.
Weightlifting is a key action in your goal to gain weight. Another one of the most important factors in gaining weight, 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.
On the second day of a calorie counting program, you should add 500 calories to your daily intake. 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. Spread your calories over a number of meals, for instance, eat 5-6 small meals rather than 3 large ones. Eat one meal every 2 and a half to 3 hours. All you have to do is be discerning, and add calories in the way of healthy foods.
Protein intake is the key to developing muscle mass. Amino acids which comes from proteins are essential in building muscles. You should daily eat about 2.2g of protein per kilogram of your weight. Your diet needs to have high protein foods in it. You should get your protein from foods instead of supplements.
Some folks have the idea that beer will help them put on some weight. But this is untrue, it accumulates in your abdominal region, making it fatty.
And, of course, get in the gym and lift! This is another important step to how to gain weight, so make sure you are doing it correctly. Some thin people think that exercise is not good for them. This is not true, it keeps the metabolism high. Remember that eating alone is not sufficient. You don't want to gain fat but lean mass, so exercise is important.
Resistance training exercises help increase your muscle mass, that then increases your body's metabolism. Begin to understand the difference between exercises for weight gain and weight loss.
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.