The problem: A three-bag laundry hamper that works great for dividing the things I wash separately: towels, socks and underwear, and clothes, but has no space for baby clothes.
My solution: A simple drawstring bag that I hung on the side of the hamper. It took about 20 minutes to make and cost me nothing - I used leftover fabric from the baby's bedding and a drawstring that I saved from a worn-out laundry bag.
I think it might have ended up being a little too small, but I'll see how it goes. It will work for now, and if I have to, I can always make another!