Even when you have your own washer and dryer, it's worth it to take your laundry to the laundromat once in a while when you're really behind on laundry. Go late at night and take over all the machines. You can do 12 loads of laundry at the laundromat in the time it takes to do one at home.
It helps to have all your clothes clean at one time, at least once per season, so that you can effectively gauge what new clothes you might need for the next season. Plus, you just might find that red shirt you thought you lost, hiding at the bottom of a laundry pile.