Schools are a boon for me. Teachers, parents, admins, students. I also "publish" a bi-monthly newsletter, promote healthy skin techniques, and donate sunblock to our local pool. I give free talks at my local library and scout groups about skin and sun and I swear by putting your marketing dollars into an ad in your local paper.
Attend everything you can in a tee shirt with your logo on it. People will ask. Always share.
Another great gift to me was to volunteer. A LOT. I volunteer at a thing called THE GLASS SLIPPER EVENT. Find one in your area. It was a blessing and I got lots of business as a side note.