helium tank, oxygen mask, tape. quick, painless, peaceful

If I have a choice in the matter, I plan to buy a surfboard, paddle out as far as I can until I'm too tired to paddle anymore, and then take a cocktail of drugs that will get me pleasantly high for my last few conscious moments until they make me unconscious and stop my breathing. Then the next big wave can knock me over into the sea so I can be fish food.

I would take a couple bars of Xanax, drink a few drinks, then run a tube from the exhaust of your car into the cabin.