Solution: Don't lug the clean laundry back upstairs. Just leave it on the main floor.
Problem: Keeping 3 kids' laundry in one small laundry room is a bit hard to manage in an organized fashion.
Solution: A table in the laundry room to leave stacks of the kids laundry on.
Problem: Socks don't stack well. And, honestly, I hate matching them up.
Solution: A small basket for each person's socks.
The baskets are from Target and cost $2.99 each. I hung them on a small picture-hanging hook so that if I ever did get a desire to put socks away upstairs, I could just take the entire basket up there and dump it in the correct person's drawer. They hang directly across from the small table in the laundry room for maximum ease during laundry folding. The kids' baskets are hung low enough that they can get their own socks out. I put their names and a small picture on each basket so they'll know whose is whose even before they can read. Halle-freakin'-leugiah!
You may notice that there is no basket for Richard. That is partly because these 4 baskets were all that was in stock at my Target, and partly because that guy has more socks than all 3 kids combined. He wears about 3 pairs a day. Don't ask me why.