In 2008, I was a Fox News watcher, and listened to Limbaugh, Hannity, & Levin. I don't believe that I ever once heard of Ron Paul prior to the '08 election. I was passionate but grossly uninformed. My trusty news sources had managed to obscure Ron Paul from my sight entirely.
After Obama got elected, I became a Tea Party co-organizer. There was some contention amongst the neocons in the group regarding "conspiracy theories" tainting the group. Those issues drew my attention and I discovered a whole lot of stuff that never got exposed by the "conservative" pundits that I faithfully listened to. I got tipped off to Alex Jones and began listening to him as well. I also may have seen some discussion of him on an internet gun forum.
From a combination of those sources and events, I discovered Ron Paul and quickly became his biggest fan.
I guess the biggest thanks goes to the Tea Party member who swirled a little controversy into the group. He's now a good friend of mine and we lead the local Ron Paul movement in our county.