Hi L.:
Depending on where you want to reach people, A great publication is Tidbits of the North Metro... It is really well read in the Anoka area and ads are full color and very reasonably priced. They have over a 2 week shelf life, so each ad goes a long way. The guy to call is Dean Prince. His number is ###-###-####. I do most of his ad design, so I may even get to work with you.
In addition to that you may consider doing a direct mail piece to your target audience or dropping postcards in the free mail slots of areas that you want to reach.
I really think that you are on the right track with FB postings and web presence. You could add an email blast to that if you have a list or you can consider buying one to target an even greater online audience.
If you need any other help with placement or design please respond back to me. I am happy to assist if I can!
H.