do it in the basement..... take a a cardboard paper towel roll, or cardboard paper towel roll, doesn't matter, and stuff laundry dryer sheets(feel waxy and come in diff. scents) and if you smoke.....you inhale normally, then you exhale into the tube filled with laundry dryer sheets and it masks the odor. you can also take one and burn it slowly with a flame to give off a pleasing smell that covers up marijuana very nicely.