Likewise, as an LDS Missionary, we discussed the most effective ways to find people to teach. When people think of missionaries, they think of tracting. Well, trackting ranked as like the 12th most effective, on a list of 15. #1 was member referrals, or a member of the Church telling a friend about the Church.
My point is, tell people about campaigns you are interested in, support, etc. In this post, Pete Ashdown talks about how if I tell two people, they tell two people, etc., just how many people will hear about his campaign.
Tell two people a day about this campaign, and have them do the same. In 19 days, 524,288 people will have heard about it. Of course we realize that people are busy, so expecting this to happen is not realistic. However, make up the gaps by increasing the number of people you tell, and the potential is vast.