First off, brain gets removed and stuck in a freezer in whatever cryosafe way you got. And not those rip-off "freeze you forever places" that break down every few years and have a thaw. No, the freezer in my grandmothers garage that has been running since it was installed in 1947.
The rest of the head, with all the fleshy bits, gets stuck in an antbed for a few days so they can pick it clean, return it to the soil and what not. My skull then is given to my ex-girlfriend, who deserves a haunting reminder of me for the rest of her life.
The rest of my body is to be hurled into the fires of Mount Doom, or the nearest actively volcanic equivilant, in a crucible and melted/incinerateed into carbon slag.
Fuse the remainder into a 12-foot tall solid diamond statue in my likeness that is very specifically faucted, so that when it is placed at the place of my death, every year on the moment of my birth, the sunlight is reflected through the statue, refocused through a series of lenses and fauctets built into it, and beamed out of the eyes of the statue, ala Man with the Golden Gun, as pure sun-laser, incinerating any loyal follower/deserved-to-be-executed denzien of The Great Republic of Freedonia.
Also a fund will be established to provide a security firm that will hunt down and manually dismantle any car that features an adhesive decal in my "memory". Seriously, if you're going to pay tribute to someone, a sticker on your current vehicle doesn't say much.