hmm i know of several.
1)dont bother with wrists. unless u are drunk when the blood is thinner. sit in a tub of hot water so it keeps it flowing.
2)stab yourself in the thigh and hit the artery. u will spurt like crazy then go unconscious and die within minutes.
3)barbiturates(sleeping aids) OTC pills are suicide proof. u need prescription ones.
shoot yourself.
4)potassium cyanide. inject it straight into your bloodstream and say goodnight
5)nutmeg-extremely posinous when injected directly to blood
6)antifreeze-Use FRESh anitfreeze and mix it in any flavor jello mix withthe appropriate amount of water/antifreeze mix. u will hallucinate and over a day or so without medical attention the ethlyene glycol will crystalize on your bllood cells. then u die.

have fun killing yourself!!!!! it is really hard to go through with unless u actually want to die. mine were all cries for help. but this was years ago.