My laundry theory: put everything in together; dry everything together; fold or hang all articles (except socks and underwear - see below); toss articles that are unwearable after this treatment. (Oh, and buy only one kind of socks; toss them loose in a drawer; any two will be a pair. You can even toss them into the underwear drawer; distinguishing between a sock and a pair of undershorts isn't rocket science.)