I've watched far too many medical dramas, urban myth plays, read far too many ghost stories and accounts of WWI soldiers being buried alive - and so... When I die, I want to be pumped up to the eyeballs with morphine, have my head cut off - all my healthy organs removed and used for Good?. Then I wish to be cremated, and want my loved ones to decide what to do with my ashes.
I do, however, wish to have a gravestone or similar somewhere that reads, "In The Event Of A Zombie Uprising, Wake Me."