It can get pretty difficult to pull off. My advice is for you to use a rope (not too thick, though obviously nothing wire-like) and tie it into a slipknot, then put the knot on the back of your head. Hang from a closet bar, or tie the rope to a doorknob and throw it over the door. Make sure that you won't be found for at least a few hours. Most importantly, build up the courage. During the last few seconds, your survival instincts will kick in.. This is why some get drunk or high beforehand. Good luck again, man. Sorry bout whatever bothered you about life.