I'd like to have my body scanned into a computer in 3D and then distrubuted as a file to whoever wants it... That's right bury me on the web!
The current state of cryogenics means that mummification is actually more likely to get you resurrected at a later date - just make sure you put the right sort of curse on your pyramid.
I'd want all my useable organs to be donated to those who need them, and what's left over given to the poor and hungry. We eat worse things at McDonalds.
I want my skin taken off, tanned, then made into a suit by an Italian fashion designer.
Give my bones to the dogs of Korea, especially those farmed for their meat.
I want my brain given to science, on the provision that they use it to find a cure for neuro-typicallity. I don't mean that they should use such a cure, but it might be handy to have one, all the same.
If I have hair, cut it off and sprinkle it amongst the tobacco in the cigarette factories.
If I have teeth, put them in the shells of oysters and then once pearlised, make a necklace of them and auction it on eBay to raise money for dentistry in Britain.
And finally, build a statue in my honour, just of my legs. Place it in vast expanse of desert with the inscription, "Look on my works, ye mighty, and despair!"
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IN GIRVM IMVS NOCTE ET CONSVMIMVR IGNI