I had business cards made up with my name, school address, phone and fax numbers and email address. Originally, I just gave them out at the meetings and conferences I attended but now I give them out to my students too. I laminate them and glue a magnet strip to the back. I get the magnets as freebies from business donations. Each family has the magnet on their refrigerator as an easy to find reference. It's also a reminder to my students that I want to be in touch with their families too.