News releases, pitch letters, letters to the editor, local radio interviews, local TV stories, local weeklies, magazines and newsletters. These are all powerful publicity tools that can target your theater going audience--IF you use them.
Yes, your publicity efforts need to be easy, fun and effective or you'll never do them, but you also need to do them or they will never become easy, you won't have any fun, nobody will know about your new play and nobody will buy tickets. So, don't re-invent publicity, just do it!