I've already gone through most of the books for giveaway, so that box is ready to go. I also have a bunch more. I was going to list them on amazon, but that is so slow that I think I'll just give them to the local goodwill.
I'm also already collecting clothes that the kids have outgrown and that the adults have either worn too much or we just don't wear. I have a box of books that I'm saving to send to my brother in prison - mainstream fiction, writing technique and inspirational types, so that will leave eventually (3-6 books every two months). We will also be getting rid of cheap toys as they break, I'm sure.
I'm not planning on getting money from my decluttering, but if it happens...