I wanna be a fossil

Basically your body needs to be protected from microbial decomposition and the chemical digestion of your own body enzymes. Microbes and enzymes, luckily for you, require largely the same kind of chemical environment, so it's fairly easy to defeat both of them at once.I'm just thinking back to conditions under which we've recovered bodies many, many centuries after death:1) Mummification by dehydration - an extremely hygroscopic environment will dehydrate your tissues. Absent water, enzymes can't break down your body and microbes can't survive. This is typically how we find mummified remains in desert environments. The Egyptians took advantage of that by packing the decedant with hygroscopic chemicals and removing water-dense tissues, such as the brain.2) Mummification by cold - cold temperatures both retard or prevent microbial colonization and retard chemical processes. For instance, this is how we found the Copper Age "Ice Man". I wouldn't reccommend cryogenics - the staying power just isn't there - but theoretically you could work with glaciologists to find a cold place where you could be buried, someplace that's going to remain undisturbed for a very long time.3) Fossilization in anaerobic environments - this is typically where most of the ossified fossils come from. This process is exceedingly rare, and because chemical decomposition is not retarded, generally little survives but the skeleton. There are still some environments today where you could expect to remain undisturbed, like tar pits, but it's a one in a million shot, I'd say.Honestly I'd say your best bet is to be dehydrated and hermetically sealed into some kind of tube, then buried somewhere dry, out West maybe. If you really want to be an archeologic find, bury yourself with a couple of newspapers and a few electronic devices. Maybe the Encyclopedia Brittannica on DVD or something. And don't tell anyone your location - your more likely to survive the ages if no one knows where you are.