Sarah, I would have to agree with Elizabeth on this one. The work in Sacramento is definitely there with the productive agents. In our office, we look for people we know mainly because we want loyalty, consistency and reliability. If you think that's you, you would be an asset to any productive agent. Good, quality help is so hard to find.
There are companies that place yard signs, like Myra said, but there is still much work that top producing agents need to pass on to someone else because there is too much to manage.
What are your strengths? If you are tech savvy you could possibly create virtual tours or take property pics, maintain websites and other social network marketing tools, etc. If office admin and being thorough is your strength, you might make a great assistant.
So what's the BEST way? I would begin by asking around, starting with people you already know who can provide you an "in" and an opportunity. If you ask enough people, and you have a quality reputation yourself already combined with the assets mentioned above, pretty soon someone will be happy to refer you.
My best to you!
Century 21 Landmark Network