I try not to dwell on my own mortality, but we all know we’re going sometime. Why not go out high tech?

[This process] involves freezing the coffin and body to -18C before lowering them into liquid nitrogen at -196C, which leaves them extremely brittle.
A vibrating pad is used to reduce the remains to a powder and a magnetic field then removes all traces of mercury and other metal residues from fillings or hip replacements.

Later you can plant a tree (which will draw its nutrients from the gravesite) on top of the grave of your loved one. Simultaneously weird and sort of beautiful.