Well... though im am a long-time user, i still have virgin lungs, as i only smoke hash oil, which is far lighter than any smoked weed. So, when i have to smoke weed, i follow that advice:

Quote Originally Posted by easy_e
Take your hit but leave your lips lightly purse them over the piece so as when you inhale to let some outside air in at the same time. (...) It takes some control but after a while you should have no problem at all taking 2 liter bong hits all at once...
If when you take the hit you inhale too smoke, let the lips more loose to allow more outside air to enter, and if you inhale too few smoke, close the lips a bit to allow less outside air to enter. Doing so, you can balance the amount of air and smoke to a degree which dont harm your lungs.

And, please, DONT smoke cigarretes!!!!! They are a poison, they are HEAVILY addicting, the cause LOTS of harm to the health, nicotine is one of more addictive substances, and the addiction to cigarretes is simply not worth. Better cough sometimes with weed than die of cancer with cigarretes.