When we made our big more 6 years ago (almost) it was very hard to decide what to give away- about 50% of our stuff. We gave books to the Loros (Leics hospice)- and plants to gardening friends- but most of the rest went to Freecycle. Some of the stuff allowed a local woman who had been through a bad time, to start a new gardening business- some garden tools, a good qualita hedge trimmer and a chain-saw and trailor. It was so rewarding to see her so excited re starting her new life. Giving things away took a lot more time and effort than throwing it all in a skip- but it made it so much easier. I hate waste, and hate the total lack of respect some people have for the fact all the waste goes to landfill.
One neighbour said she didn't like to give stuff away, because some of it might be re-sold. I have no problem with this- if someone is prepared to collect ans store, then advertise it for sale- via e-bay or whatever- fine. A zillion times better than ending up in more landfill!