Man straight up, have you ever played 2puff windmill with a friend before? Or if no one is around just do it to yourself!!

1-Basically, roll yourself an L or normal sized joint woteva u want and light it
2-take a fair sized toke holding your breath
3- keep the smoke down, almost immediately take a second fair sized toke down and hold your breath
4- Pass the joint on to your boy (or keep in your hand if smoking to yourself) remembering to keep holding your breath, this will get hard, but the more you do it, the easier it is, whilst he repeats the same process as you have just done, you need to hold you breath untill you recieve the joint back (If smoking by yourself just remember basically just to hold your breath untill it becomes difficult) .
5- when you have recieved the joint back, relax and breath out your 2 lugs worth of ganja smoke and i bet hardly any smoke will be visible (if you held your breath for a while). Alternatively if smoking alone, obviously just hold you breath for as long as you can, and relax and breath out.
6- whilst rapidly re-gaining your composure, repeat the same steps again. Quickly catch your breath and take another fair sized toke down, then quickly after another toke, and hold ya breath whilst you pass the spliff on to your boy!
7- do this shit till the spliff is finished and i guarantee, if you master this technique, after 2 joints, you will be blazed as hell!!