Many different methods. Some will suggest a toilet paper tube with dryer sheets at the end to mask the smell.
However, I've come up with a very good formula for completely eliminating any traces.
Step one, put on the fan, point it toward window.
Step two, get a jar or a shot glass or something see through to place over your bowl while you toke, it'll trap any leakage smoke.
Step three, get a towel, get it wet, and blow your hits into the towel.
Step four, light incense stick, walk around to each corner of the room and blow a little smoke in each corner, stifle the flame of the incense and turn off the fan.
And if you're worried about noise, music.
Voila.