Just some simple rules as courtesy to not ruin the high and stuff.

1. Don't be a bastard, we are here to get high and enjoy ourselves, not to be bastards.
2. When on a bowl or bong, clear it before you pass it, no one wants a stale hit.
3. If you finish the bowl, pack a new one.
4. Whoever packs the new bowl or rolls the new joint, gets first hit(s).