Ways to top yourself.

[The Vicar]

Here's my suggestion.

First you need to get some piano wire. Then get a length of rope longer than the piano wire. Next tie the piano wire around your head. Make sure that it is secure and over your neck so the only bones in the way are those of your spine, and not your collarbone. Next tie the rope around your ankles ... once again make sure to use a good solid knot.

Now hopefully you have set yourself up at the top of a tall building. You tie both the rope and the piano wire to the building. Also hopefully you have made sure to have more than 50 feet of piano wire-probably 75 feet of rope and probably 150 feet of building. Now you have to hope no one interrupts you during the next part. You now Super Glue your hands to your head. Wait for the Super Glue to dry.

Now jump.

Now if you've done everything correctly you should be hanging face down holding your own decapitated head.   A true class way to die.

[The Vicar]

Why not be a man and do it Jap style

Seppuku

Japanese ritual method of suicide, practiced mostly in the medieval era, though some isolated cases appear in modern times. The most widely-known part of seppuku in western society is probably the slashing of the stomach; however, the ritual is far more complex than that. Dressed ceremonially, with his sword placed in front of him and sometimes seated on special cloths, the warrior would prepare for death by writing a death poem. With a selected attendant (kaishakunin, his second) standing by, he would open his kimono, take up his wakizashi (short sword), fan, or a tanto (knife) and plunge it into his abdomen, making first a left-to-right cut and then a second slightly upward stroke. On the second stroke, the kaishakunin would perform daki-kubi, a ritual in which the warrior is all but decapitated (a slight band of flesh is left attaching the head to the body). In the case that a fan is used (usually when the person is very young or particularly evil) the kaishakunin would perform the daki-kubi the moment the fan touched the person's stomach.

or maybe...

Tourist Execution

Suicide by smuggling drugs into a country where the death penalty is frequently used. While the time spent in prison is often highly unpleasant, state execution is an almost certain method of death.

...or this little beauty. This method would probably work best in the states.

Suicide by cop
The practice rates for suicide by cop have increased over the years. It entails the act of someone purposefully behaving as if they would be dangerous in front of a law enforcement officer or other armed officer so that the officer would use their weapons to kill. Sometimes people use toy weapons and appear as if they are a threat.
 
Make sure you find a 100% sure method.  Nothing worse than cocking up a suicide...

Prague - A 32-year-old Czech tried to commit suicide by cutting his throat with a chain saw but survived after the machine missed his jugular artery and got stuck in his spine, a report said on Wednesday.

This was his second suicide attempt, CTK news agency reported. He had earlier tried to hang himself from a tree branch but the branch snapped and he broke both legs in the fall, it said.