Here are some ideas that I've compiled from Ron Paul's MySpace group and northern Utah's meetup group and elsewhere...
* Donate money to Ron Paul's campaign if you can afford it--every bit helps. Do odd jobs or donate blood or something to raise extra cash if you like.
* Express your support! Post Ron Paul banners or signs where permissible along high-traffic routes. One strategy is to knock on doors of homes either on corners of major intersections or on outside curves on busy roads and, if they support Ron Paul, then ask if you can post a huge sign on their lawn where drivers-by can see it. Post Ron Paul fliers where permissible where passers-by on foot are likely to see them--kiosks, telephone poles, bulletin boards, et cetera. Put a Ron Paul sign in your yard and/or in your window. Place a Ron Paul bumper sticker/magnet on your car or bicycle. Buy Ron Paul t-shirts, polo shirts, and/or buttons and wear them. CafePress.com has plenty of Ron Paul stuff like this for sale. Also, put Ron Paul web banners and such on your website, if you have one. Some folks on Ron Paul's MySpace group and elsewhere have developed some nice ones if you don't want to make your own. Get his campaign as visible as possible.
* Place Ron Paul ads in your local newspapers, whether classified ads or Internet ads or retail ads. Monitor their articles and write good letters-to-the-editor in response to appropriate articles presenting Ron Paul in a positive light. Call talk radio shows to which you listen and do the same. If you have the resources, then buy a TV spot or a radio spot or rent a billboard or do something fun and unusual and creative. Advertise!
* Get Ron Paul business cards and distribute them at every appropriate opportunity. Go door-to-door in your community (or outside of it) distributing fliers, brochures, and/or door hangers, as well as talking to folks about why you support Ron Paul and why you believe that they should, as well. You don't have to design your own campaign materials for this purpose unless you want to do so--you can find many designs on the Internet produced by creative Ron Paul supporters that you can readily print and distribute.
* Staff booths at local town festivals or county fairs or other appropriate events where permissible. Have a Ron Paul bake sale and donate all profits to his campaign. Get people together for a Ron Paul rally--and notify the local media with a press release in advance so that you might get some coverage. Host a party at your home for the next Presidential debates and express your support Ron Paul at them.
* Talk about Ron Paul with your relatives, friends, co-workers, associates, random strangers, et cetera.
* Get active with your local meetup group, sharing both ideas and resources and coordinating on group projects. If you're a student, then organize a student club to do the same on your campus.
* Plan to get yourself elected to serve as a state delegate to next year's Republican National Convention.
Can anyone think of anything that I missed? Thanks!