Mate, sit down this evening and write a letter to past customers. Something like Dear Mrs.....
Thank you for using us to clean your carpets in the past, your custom is much appriciated.
Give a little blurb as to how you got started (eg. I started with an astra estate car with a little portable machine in the back and (hence the name astra clean) and have now upgraded to a high powered van mounted machine )
We are now using a fantastic cleaning agent/ machine etc which gives the deepest clean and the shortest of drying times.
As a thank you for your past custom, I am offering a £15.00 discount on any cleaning done during the month of august subject to a minimum charge of £75.00 ( or whatever you want)...................
Send out 300-400 and I guarantee you will get phone calls (or your money back!)
Hope this helps, your past customers are definately the easiest people to target.
Clive
ps I send out a similar letter for feb and always get work from it.