I find that it's word of mouth that fills most of my spaces. I've tried ads on FB, Moms groups, community groups, flyers on mailboxes, flyers on cars that are parked somewhere mom and baby related like play groups. I've tried care.ca but to be honest, the quality of parent on there is dreadful.

What seems to have worked is just getting my name out there. Lawn signs, car magnet advertising my daycare, sponsoring the community flyers in exchange for an ad, sponsoring a local sports team so my name in on their sweaters. Of course all that takes time.