gun to the head-Most effective and as long as you don't fuck around, pussy out, and miss giving yourself a massive head wound and making yourself a vegetable.
jumping from high places-Would not reccommend.......Seems like too much time to regret the decision.
hanging-This is how my brother offed himself......Put a dildo in your ass before you kick the chair so it'll at least be funny when someone finds you.
drug/chemical overdose-I think this would be my preferred way, but if there is a lot of pain from the OD, it's probably the shittiest way to go
face sitting by fuggz-The smell will kill you first
Judas Chair-Seriously, kill yourself
wrist cutting-also one I wouldn't reccommend based solely on the amount of time that will pass, but I guess if you attempt this one, don't do it like the do on TV. Through the woods, not across the pond.....Or some shit like that.
electrocution-Can I watch?