May I suggest a little forward planning in these lean times?
Get the leaflets out offering services, boiler changes etc.
Get some nice professional cards printed for the shop windows, providers, B&Q etc
Take a little time to have your web sites updated.
Give the van any touch ups it needs, if its starting to look a bit tired consider a body wrap which can be written up.
Have a look around at community halls churches etc usually cheap advertyising in their Sunday missels etc.
We all make the same mistakes, never bother marketing when we are busy, a friend of mine in Florida goes as far as leaving his business card with the tip when in restaurants coffee shops etc learn a little from him, the man is a multi millionaire but in his own words "Always Hustling".