Thought I'd share a bit of my story. Started January of this year, and since then I have put on 10kg, fluctuates a bit depending on my diet.

In January alone, I put on 7kg. Weight training, eating healthy, protein rich food like chicken breasts, tuna, cottage cheese and steaks (with vegetables at every meal), 5-6 times a day. Also, I drank 2litres of milk a day.

The only reason I haven't gained more weight is because I came home for CNY in Feb, and my diet has been crap (but so so tasty) for a month.

If you're serious on gaining weight, you have to be equally serious in committing to working out, and eating. Eating is incredibly important. Do compound exercises - squats, deadlifts and overhead and bench presses.

Check out stronglifts.

I used to think it wasn't possible for me to gain weight, because I had skinny genes and all sorts of excuses. It's definitely not fair that some others seem to put on bulk so easily, but if you really want to bulk up, you can do so.

60kg to 70kg in 2 months is quite a bit, to be honest. Even I was taken aback. Remember, consistency is key - in eating and working out.