What are some sure-fire ways to end my life?

I posted a question earlier on how to go about slitting my wrist. The answers were not what I was looking for. I have since decided against slitting my wrist. However I have not decided against killing myself. What are some sure fire ways to commit suicide?? PLEASE NOTE: Do not tell me things will get better, things could be worse or to get help. I am a consistent little *****. I will not listen. I have been to the hospital to many times to count, talked to too many shrinks, taken too many meds… You should not feel sorry for me. If you knew what I did or who I am you would want me dead- many people do.