I recently listed some best practices for using Quora for a job search but more broadly for reputation building.
You can read my post on Mashable: 12 Ways to Use Quora For Your Job Search.
Earlier this year, on Web Worker Daily, I also explored Quora as a tool for finding answer to work related questions. Verdict? Can be useful in some circumstances but not when time is of the essence.
And more recently on Web Worker Daily, I took a look at building your reputation on Q&A sites including Quora, Namesake and Focus. Each serves its own purpose in its own way and choosing one over the other depends on your goals, who you are trying to reach, and your personal preferences for how a site works.
How are you using Q&A sites and which one do you like the best?