No, but the other day I knocked up a website, to tell future customers about me.
Did a hard copy to sit and read it, 1 A4 page almost full of babble (not a shock from me is it?)
It suddenly made me wonder, a twice yearly or quarterly newsletter could be used for such purposes as promoting seasonal work, you could also offer a few general security hints such as "buy a dog bowl even if you do not own a dog" and "do not leave windows open" or even "leave a light on now the nights are getting longer" just to make it a bit more of a sort of infomercial. Add a bit of "In the winter months it becomes harder to find days which are window cleaner freindly, these months I am available for blah blah blah" and "during the summer time I have more time available and would be happy to quote on blah blah blah"
just a thought, as it also brings you closer to your customers.