Another piece of advice: Use a bowl with a cover. I live with people who know I smoke, but don't like the smell. (Savages!) I use a protopipe, and I slide the lid closed after every hit, and then "ghost" the hit. (hold it a good 20-25 seconds till when you exhale, little or no smoke comes out) I don't use doob tubes, or incense, or anything to cover the smell. No one is able to tell I just smoked, unless they catch me raiding the fridge! Another benefit of using a pipe with a cover is that your herb only burns when your hitting it. It sucks that I have to relight it each hit, but my herb lasts twice as long, as very little is wasted.