I would be interested in reading peoples responses too, as i printed off a load of pages from the confederation of cleaners too.....especially as a lot of cleaners have done the above vote....but not written their comments.
I was in a past life a member of Proclean, who were set up mainly for carpet cleaners. They had plenty of advice on how to make your business grow, had the occasional training session - which did cost, but was beneficial at the time.
However, as a recognised association, they had marketted the brand (just look in the local yellow pages for example), and when people called their office for a Proclean Carpet Cleaner, they would ring the nearest cleaner to give them the work. I did get lots of work from it.....plus the logo on the van and paperwork. They also got you discounts on insurance etc etc
Regards
Tim