Some of the things you can do are to advertise on
1) Network, network and network
2) Advertise on Facebook
3) Partner with local businesses
4) Share some free samples if possible
There are several more strategies you can implement depending on your success.
I would also agree with what Accountant said, but add a couple more things. If you can afford it you could try local television advertising, though your local broadcast stations or Comcast. Also, as I have advised before on other threads, get business pens printed up and then proceed to "lose" them or give them to people who use a lot of pens. Lots of stores get pens taken all the time so they appreciate more, and everyone that is taken is your company number in another person's hands.