I'm doing things a little differently this year. I'm sending out renewal letters with this months invoices to get everybody to renew for the 2007 season now. I wrote a letter that says Hi and some small talk, then to offer snowplowing, and then saying that renewal letters are being sent out. As an incentive to get them turned in, I said new customers are calling in for the 2007 season and want prime spots (wed/thur/fri) so I need renewal letters in by 9/20 to lock in your prime spot... otherwise you might have to resort to undesirable mow days. I think its good to get everybody locked in before they see free lawn mowing fliers come spring, don't you?