Buried, not cremated (please)
Remove any recyclable bits
Plant a tree on me
Have religion if you want but it means nothing to me - the religious bits will be for you (all funerals are for the benefit of the living)
There must be no wake - none, no gathering on the day; for the grief stricken these occasions are horrendous (I am assuming I will leave some grief-stricken).
When you do gather together and think of me, play Teen Spirit, it will make you feel better... then play The Ballad of Dorothy Parker, 'cos it's ace
If I leave anything of value, divide it equally between my nephews and nieces but sell it - no dividing of things, only divide the money (except for the die-cast Jaguars, they are for my older nephew).
If you must, then give something to a local charity for the homeless, do not spend anything unnecessary on my disposal.