If you contact a Ride Guide, they can e-mail you the graphics to print out a poster. They can also provide door knocker leaflets if you go door-to-door, and they can provide a little cardboard Ride display with pamphlets that you can display wherever you want.
There also some Ride promotional videos which they can provide a link to if you want to download for presentation.
Then, of course, there's the Ride t-shirt which you can wear.