One other thing that has helped me keep my sanity: wash and fold laundry service. You take your dirty laundry, put it in a bag, and they'll clean and fold it for a modest fee (the place around the corner from me is around $1.10 a pound). In urban areas you can find services that will pickup and deliver.
It's a luxury, but it isn't that expensive (especially if you typically rely on coin-op laundromats anyway) and it's one less thing to worry about.
Funny, for me it's the opposite. I've taken to kind of _enjoying_ folding laundry since I started working on AppStoreHQ. It's the mindless release that I need every once in a while.
I do laundry about once a week, and it takes about 2 minutes to load and start the washer, and after an hour (or whenever you get back to it) another 2 minutes to load and start the dryer. After that, you can just get clean clothes out of the dryer instead of dresser drawers. My girlfriend doesn't like this life-optimization.
But is it quicker to charge every customer the same rate per lb of laundry than to spend time analysing the laundry or ask your customers to pre-sort? I'd say yes.
It's a luxury, but it isn't that expensive (especially if you typically rely on coin-op laundromats anyway) and it's one less thing to worry about.