To die painfully: Take a razor blade and make slight slits and cuts all over your body (and I do mean ALL over) so you bleed little by little in hundreds of areas, causing you to bleed to death.
To die scared: Have someone strap your arms, legs, torso, head, and neck to a table just long enough for your head and legs and wide enough for your torso and legs. Then, have a mechanism of some sort (using plastic water tubing 1 in. in diameter, a slow small current of water, and a small water tank) drop small droplets upon your forehead, 1 drop at a time per second for 1 week straight with nothing to eat. It's called Chinese Water Torture.
To die in agony: Cover your body in either pigs blood or cows blood and throw yourself into a tank of piranhas.
To die quickly: Sharpen a lawnmower blade and hold the blade from the sides. Then pull your arms back so the blade digs into your skull. That or flip a lawnmower on its side and turn it on. Then jump head first into the blades spinning and bingo.
---
"You tried your best and you failed miserably! The lesson is: Never try!" -Homer Simpson