One thing I've found works well is conversations. By having conversations with people, reaching out to many, you increase your "faceshare"(just made that up,lol).
Getting yourself re-tweeted by someone big would be biggest option for continuing this route, as that puts your name in front of so many people.
Also, let me make clear I believe in organic content. I'm just talking about getting your twitter account out there and with targeted followers. I think all IM'ers look for more and more leads because, as they say, the money is in the list!