Hot bath, sharp blade, blood thinners, researched where to cut, etc. But don't do it. You will be in a lot of pain for who knows how long, and the odds are very much against you if you want to succeed. If you can get your hands on a rope and a place you won't be disturbed for a while, I'd say go with hanging. Unless there's a method that you would rather go with instead (just not cutting!).