With the new jobs board and podcast discussions on employers searching over Stack Overflow for information about applicants, what is the most appropriate way to promote yourself using Stack Overflow?
Double check spelling and grammar before posting. A lot of employers will be turned off by minor grammatical errors. Firefox has a built in spell checker if you need one.
You can always go back later and edit your entries for accuracy too. Maybe have someone proof your grammar.
You might take some of your top rated answers / questions and expand them to be more complete. Then include a reference to those answers in your resume.
I see a few MVP types deliberately promoting their own sites on SO and SF. There is a fine line between this and spam but as long as the material is relevant I don't see any issue with blowing ones own trumpet. If the postings are offensively spam-ish they will get flagged so the system has built-in checks and balances that prevent this anyway.
I don't really use SO as a promotional tool (possibly I could), although some of my longer answers are verging on white papers and might be worth rehashing as such. I think that a personal or professional web site is probably a better front-end but you could link to particular SO answers if you have anything you are particularly proud of. The reverse is also true. If you have a site with significant material (even a halfway decent technical blog) you could fan out to it from SO.