content: What the other guy said is right but i have simpler advice for you.  I have still a lot to grow and still kinda skinny compared to most guys in my gym so i'm not an expert or anything, but in my opinion since i've met many people who do totally different things, do what works for you. You don't need to do 5x5 or calistenics or hit that muscle group 3 times a week or eat 6 eggs and a milkshake a day just because it works for someone else. My philosophy has just been to eat as much as possible obviously trying to incorporate a bit of everything but without going mad counting nutrients calories and shit like that, i just eat as much as i can, and i follow a pretty generic training program that they made me at the gym, i go 3 times a week but if i feel like and i have time  i can go more, not less though, discipline is key in this. Guess what, i'm on my way to having gained 20kg from when i began, do what works for you, so long as you are disciplined and eat enough you will see amazing progress.