How do you become an Advisor?
momo is right and there are lots of other great answers already on FA. Go here for the Advisor Guide: http://www.funadvice.com/doc/advisor_guide
And here for other answers:
Well every one here has gave you the some good advice but another thing is when becomming an advisor you need to fully understand the site. And you need to be on this site more then one or two months.
Advisors are the official voice of Funadvice, and are users just like you and me. Users get promoted to advisors when they've either been ranked highly by other users, or have just provided great answers.
momo91 has it pretty much spot-on. Check the Advisors tab at the top of your page for more info.