burned, pack tight into a canister then blasted through a blackhole (no I'm not kidding).
Since all matter (appears) to cease existing upon entering a black hole (infinite amount of mass at the singularity) I would no longer exist in many different ways 😉
I just don't like the idea of becoming food or something for worms (if you are burried that will happen eventually and if you are cremated it will happen sooner heh). I just want totally cease existing, mind (death) and body (the matter being destroyed).