I just keep business cards on me and give them out when I meet someone at the park etc. I just made my own on the computer and print them out now and then...it's free (except for ink and paper) and easy. I do the same with the Kijiji ads as mentioned above...except that I repost every single morning when I am wanting to fill a spot...it helps! If you leave it a day or two you are on page 25 and nobody sees your ad. If you put an add on the mailboxes, I would make a full page ad with little rip off tabs at the bottom with your number and email address...it always bugs me when I see an ad on a mailbox for something I am interested in, but I don't have a pen and there are no numbers to pull off! Good luck!