Drop hanging is the way i'll probably end up doing it. Jump down, and in less then a second your neck snaps and you go unconcious. Your heart stops beating in 10-25 minutes from what i've read. So make sure you are alone for a solid hour at least.
It's cheap too, just get rope that can hold like 6-7 times your weight. 600-700kg should be plenty for most people.
It's not easy though, and it definitely requires you to think for yourself. Unlike some of the braindead retards i sometimes see posting here. Google it if you're curious.