Suicide, either gunshot to the head, hanging or overdose in my bedroom preferably alone and with no note.
I'd probably do a bank heist, robbery or something along the lines of that before hand.
Not to sound emo or edgy but suicide is the only death i could accept, death being on your own terms and all; dying at the hands of someone else or something out of your controll would be horrifying. Death really is scary but it's not so when your doing it your way.