A few ideas from ...

Just go this list in through the inbox:

"Guerrilla Rick Crandall, who is a marketing consultant, editor, author, and newsletter publisher, gives us 20 simple and inexpensive marketing ideas:

Send unusual postcards.
Request testimonials from good clients.
Go on a local talk show.
Refer business to a client.
Test offers with small classified ads.
Put a "take a card" holder in a neighborhood business.
Give a guest lecture at a local school.
Send a lottery ticket with a note: "If you want better odds, talk to us."
Find a new online discussion group.
Have a contest for the best and worst of something related to your area.
Try to bring back an ex-client.
Give evening seminars in your offices.
Create a flier and pay kids to pass out copies of it.
Approach a competitor about mutual referrals.
Sponsor a talk by a visiting expert on a topic for your clients.
Call ten people you've been meaning to talk to.
Find a marketing mentor and meet with that person regularly.
Put a company logo or sign on your car.
Change your phone greeting to "How can I help you?"
Take a client to a ballgame."

taken from the Guerrilla Marketing neswletter by Jay Levinson and Amy Levinson