First find a large amount of thermite and a lighter. Drive a car in the middle of the night into a lonely part of town (a parking lot, or maybe a back street) with the thermite and the lighter. Once parked, get out of the car and spread the thermite in a line over the middle of the car. Get back in the car, shut the door, and open the window. Lean out of the window and use the lighter to ignite the thermite, then quickly take a seat between the driver and passenger seat of the car. If done correctly, the thermite should effectively cut the car in half, while killing you from either the heat or the actual fire. Everybody goes on their commute the next morning to find a horribly scorched and unidentifiable body in a car that has been mysteriously cut completely in half.
Dear idiot, this is not /b/. Go there. They'll mind **** you until you die if you honestly think posting here is so damn cool.
Jump off the second floor of a shopping mall. Try to plunge on the nozzle of a water fountain. Bonus points: Load yourself with pennies and other coins.
Take a handful of regular strength Tylenol and chuck it at a sleeping person's mouth in a park. Or grab a guy by the ankles... then beat another person to death with him. They died of natural causes 8)