So far I haven't done anything which I really should, having gone through this with other relatives. I'm not wealthy nor do I have any valuable assets that anyone would argue over. If I die before the my mother or siblings I don't think they'd have any trouble dividing my possessions; if I die after them then it won't matter what becomes of my stuff.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman