2 adults and 5 kids in our house. DH does the washing and drying part of our laundry and I do the folding and putting away (ie, total fucking ballache part of the process). For various medical reasons, our kids are unable to help.
DH does at least 1 wash a day (if he doesn't then the pile gets totally out of hand). Before I went back to full time work, the clean clothes would accrue in a relatively small pile and I would fold and put away twice a week. However, since going back to work full time, I actually cannot get on top of it. It just piles up and up and up, and the only time I get a chance to tackle it is at the weekend, by which time there are 2 huge overflowing tubs of it strewn around my bedroom (which stresses me out no fucking end), and it takes the bones of 2 hours to fold and put away. And starts piling again immediately.
Unfortunately, we don't have a spare room that we could dedicate as a laundry room, and can't afford to get someone else to do the folding etc. And even if we did, it wouldn't really help unless they would actually come in and out the stuff away.
Please please please share your winning laundry routines/systems before I totally crack up and burn all the clothes!!