I have taken an entire shopping trolley stuffed with books to the charity bookshop! They were very chuffed and made sure dd didn't escape while I browsed a bit (ended up with 4 kids books and 2 for me, and a couple will go back there once read). Looks like I'd actually done shoes already but one pair and a dress I got from a clothes swap have been added to the bags to go.
MrNC is flipping through some old mags that sell on EBay - 3 posted today. When asked bluntly 'do you want this mag more than you want 8 quid', he's quite receptive to the idea.
For those with problems of parents buying Stuff (especially bargains...), I find it helps to be able to channel them into looking for stuff that you would find useful ("Mum, if you see good quality trousers or coats for boys age 7 or 8, especially not boring blue or grey, or waterproofs, or dressing up stuff, or Duplo, that would be really helpful.") I feel quite happy to send 95% of the influx straight to charity when it also includes some expensive clothes I am actually grateful for.
Ds's school library has been telling me about how desperate they are for more stock as so many books fall apart so fast, so as MIL frequents car boots in an area where people actually give things away, and 20 books for a quid is typical, hopefully I can make this into a good match (MIL will give us carloads of potentially useful Stuff no matter what!).