Who is getting hired and how did they do it?

I recently read this article claiming that my city, San Jose, was ranked third on a list of cities with the most job postings per capita. I haven't been looking for a position long, but my search thus far hasn't been particularly robust. According to the article, most of the job postings are related to the tech industry which makes sense but quite irrelevant to me since I am not an engineer. It seems, for the rest of us, the outlook remains steadily bleak...but not dead. There are jobs to be had. My question is: In this fiercely competitive market, who gets the interview? How do they get it?
Advice abounds. The consistent prevailing message seems to be an emphasis on networking, particularly utilizing online social networking tools like LinkedIn and Twitter. Establishing an online presence is undoubtedly important. I, for instance, have a LinkedIn account, Facebook account, Twitter following, blog (duh) and am working on a personal website. Granted, I haven't been searching for long, but I have yet to see any ROI. A huge problem for me is a career switch I made about a year ago that, although providing me with incredible experience and opportunity, did not afford me numerous personal contacts. In addition, I am not that far out of graduate school so my professional network is fairly small. This is definitely a roadblock that I need to prevail. So what works? Unconventional methods? Possibly, but could be risky. Many of these stories I have heard are anecdotal and statistically unlikely. I read many recruiting blogs in an attempt to navigate the world of head hunters but much of the advice is conflicting. Who do I believe? What do I do? Did you land an interview? How? Let me know!