“Content is king” is good advice, but I hate to disappoint… just delivering great content isn’t going to get you your first avid fans.
Facebook groups will, though. Networking with other bloggers in your niche will. Going where the conversation is and providing real value in the form of opinions will.
And, weirdly enough, this is the type of stuff that makes one feel sleazy. It feels disingenuous to reply to folks who share their opinions on the web, or to comment on someone’s post just so they can comment on yours.