Donate your books to your local library. Taking a cue from J.K. Rowling, I did the same. It is a nice feeling to know that a local reader will stumble upon your work.
I donated copies of my books to the Katie Wheeler Library in Orange County. In addition, I have been monitoring their check-out history and found out that they have been checked out a number of times already. I will keep you updated on any further developments. Wish me luck.