It may very well be too late for this campaign season. Sadly, I think many are coming to the realization that Paul's support is a mile deep, but only an inch wide. We have a very dedicated, enthusiastic bunch of supporters, but there simply are not enough of us to make a significant impact especially since we are coming into the bigger primary contests and the Paul campaign has been unable to secure a win with their strategy.
However, if you are concerned about how we can move forward and work on a local level to elect sound candidates to office, you would need to get yourself involved in your local community so that you can have an influence on how others vote. In my opinion, the true measure of a grassroots activist is not how many Facebook "likes" they can get for posting an article, but how many people from their local community that they can deliver to the polls and vote for a particular candidate. This is more than simply knocking on doors, or handing out fliers at the local mall. While those things are beneficial, nothing beats a personal recommendation from someone that others know and respect. I detailed some ways to get involved in your local community in another thread. Feel free to have a look at it.
http://www.ronpaulforums.com/showthread.php?363816-How-Many-Votes-Can-You-Deliver
If you can become involved locally, you can deliver literally hundreds of votes from your local community for a sound candidate.