Vast majority of my work is repeat & referral Dave, so I keep the mailshots going out to my old customers at least twice a year. I do a little bit of my own leafleting (tiny amount to fill gaps in the day sometimes) and I deliver "neighbour nudgers" to the houses around a customer after I've done the job.
I don't advertise, as in newspaper/local mags.
YP/Thomson for those who still use it (still get a return but nothing to write home about these days)
Trying to use the phone more these days for commercials, although I hate doing it and it is soul destroying. Did quite well on the schools last year with that approach. the thing is once you've phoned and got the details of who to address things to, you can then send a targeted mailshot. Telephone sales is one of my things this year I'm trying to push myself in to doing more of, because it does work.