Word of mouth--referrals from other clients.
Its won some awards and has gotten lots of compliments. Its also very streamlined and things are easy to find. It has case studies about what we've done for clients, as well as hits we've achieved. I think it is very good for potential clients to read to get a good understanding of what we do.
We refer interested people to our Web page--it answers a lot of initial questions for them in the first stages of getting a new account.
Again, mostly word of mouth, key word searches for Public Relations.
Pamphlets, direct marketing--I've always heard, It is the cobbler's kids who have no shoes' meaning that we publicize our clients first so sometimes, we don't get to our own marketing :)
We specialize in high-tech PR--we don't do a lot of different stuff and have a PR division. We come from Journalism backgrounds so we know what media want. We're persistent, but not pushy. We also try to stay small to be able to give better customer service.