Referral sources are worth their weight in gold.
We have tried not to put all our eggs in one basket.
We do work for Ethan Allen, and also a local contemporary only furniture store, a major local carpet and fine rug dealer, a large restoration company (cleaning tile/grout, carpet, upholstery, mattresses, and carpet stretching); in addition, we also clean for several dentists, several repeat commercial clients, several local commercial electrical contractors, and a local high-end design service who also sells furniture and accessories, but, our largest piece of the cleaning pie is residential carpet, upholstery, and tile cleaning.
It has been really nice these past 4 years not having to spend any money on advertising, other than the reminders that we send out.