Just GET RID!
Last year I had to clear my stepmum's house after she died. I live hundreds of miles away so I had no opportunity to take things away and dispose of them thoughtfully. With help from neighbours, we took 6 carloads of stuff to the tip and filled a van for charity. The rest, including some fine china and decent studio potttery, went to auction where it raised pitifully small amounts.
We threw out thousands of photos and old greetings cards, and a good deal of clothing and shoes, although the better stuff went to charity. It was an exhausting and rather depressing task, as so much stuff that could have been useful to someone just had to be thrown out.
I am determined not to burden my children with such a task. I am trying to get rid of something every day this year (pass it on, give to charity, sell on eBay, or bin it) which is proving very easy so far. If I don't actually use or enjoy a possession, it might as well go to someone who will use or enjoy it now. If it's stuff that belongs to my children (now 40-ish) they can either have it now or chuck it out. Even things of "sentimental value" are a bit meaningless if I don't actually look at them any more, and in most cases the value will be nil for anyone else. If I have books I will never open again, or CDs I never play, or clothes I never wear, they should go to friends, family or a charity shop. Not when I die - now!
Have a heart - the best thing you can leave to your children is a tidy estate!