Well first of all, avoid using blunts/joints because it's constantly lit and produces a lot more smoke. Several methods that I use....
-the shower method: right after you're taking your shower, leave the hot water on (not too hot or it will steam up too much) and just blow all of your hits into the water/steam. if it's still smelly just pour some body wash or shampoo to cover the smell.
-out the window: you get the idea. eliminates pretty much all smell
-fabric softener sheets in an empty cardboard tube/rolled up sweatshirt/pillow/etc: word