I like to ghost the smoke every time I hit a jay or a blunt... helps the smoke cool down for a sec, but can feel quite harsh when you first start doing it. For bongs... I try and fill up as much of the chamber as possible with one breath. Then I hold the mouth piece and the carb with my hand, breath out, and immediately take a deep breath and try to take in as much smoke as possible. Then, I pass it on to the next person, so that they don't have to light the bowl. It's a pretty nice gesture, and people will love that you basically set up their hit for em.