The only time we knock on the door is if a neighbor or customer says x is interested. Other than that we buy 20000 or more business cards and run a special on the back. Kind of like a loss leader but really no loss, just a bit less profit. Usually run free aeration with signed yearly contract. figure the 50 bucks I would make off an aeration is far less than what it takes in phone book adds and what not. We average a 15-20 percent response and land 5% yearly accounts and another 8% on onetime jobs. Thing is we only do this in the spring but get calls throughout the year.
What ever I do I must do it right!