Post effective but unusual suicide methods:
1. Jumping into a Volcano, somewhat common in Japan -
http://en.wikipedia.org/wiki/Kiyoko_Matsumoto ( 944 people (804 men, 140 women) leapt into the crater. ) In 2002, the Germany-based volcano researcher Richard Roscoe filmed a 66 pound (30 kilogram) bag of leftover food and other organic matter being thrown into the lava lake of Ethiopia's Erta Ale Volcano. The bag of waste fell 260 feet (80 meters) before striking the surface — and, as seen in the video, it ended up making a dent. "falling from a height, a person would be able to penetrate the crust of the lake and submerge in it."
Pros - 100% effective, no body to clean up, nobody will be traumatized, nobody will know you commited suicide unless you leave a note, free, requires no preparation, even a crippled retard could do it.
Cons - You need a Volcano nearby or funds to get to a Volcano.
2. Decapitation by tying a rope to a tree and driving away in a car -
http://news.bbc.co.uk/2/hi/uk_news/wales/7548504.stmPros - effective and instant, no pain? leaves a nice view if you want to go out with a bang, available anywhere in the world.
Cons - Requires a car and rope, the value of the car will go down if you want someone to inherit it.
3. Suicide by timing device -
http://www.telegraph.co.uk/news/uknews/1428408/Suicide-by-DIY-guillotine-and-an-ingenious-timing-device.html, A builder took 12 sleeping pills and lay on his bed under his home-made guillotine. Hours later the blade was released by a timing device and cut off his head.
Pros - 100% effective, occurs while you're asleep, no pain, available anywhere in the world.
Cons - Requires a lot of preparation and some funds.