Right outside my window is the roof, so I usually just climb out of my window, and smoke a joint on my roof. There's a certain spot on my roof where at night even if you're on the ground looking directly at the spot, you won't be able to see anything because its completely dark. Sometimes I'm too lazy to do all of that, so I just pack a bowl on my window cill, blow out the window, light some 420 brand incense (which is made for covering up smoke), listen to some music, and pass out.