If you smoke up someone, and you have food you must share. Never wet lip the joint.
Nothing is worse than sucking on a soggy joint.
Take the time to pick out your seeds and stems. Always say thank you to those who smoke you. Always hold in your hit. If you come in to a group that is already in smoke session don't expect to hit it till every one befor you has had there turn then if some one offers it then its ok, but never ask. The only time to kide your weed is when the local Scavanger smoker comes along just to look for a high.