I have found targetting properties with for sale signs outside has been very worthwhile this year. I ask the people there to leave my flier for the new people, and also I have had quite a bit of work from the people there when they move to their new houses.
One couple actually asked me to come with them when they were viewing prospective houses and give them an idea of costs for a new heating system and bathroom for a couple of places they had narrowed their choice down to. They bought the house and I got the job to do all the plumbing, and I also got the kitchen refit and joinery work for my joiner friend, the decorating for my decorator friend and all the electrics for my electrician friend all from one knock at one door.