http://www.lifehack.org/articles/management/expertise-is-it-your-ticket-to-bigger-and-better-things.html

An interesting article on being an expert. Basically deals with marketing your skills appropriately. An extract:

Here are just a handful of ideas that can get you a little recognition as an expert:
Respond to requests for information from journalists on HARO
Volunteer your expert services for a non-profit
Give a talk at a conference — and if you can apply your field to another industry’s conference, go for it!
Offer a guest post to a blog
Submit an article to a trade magazine
Present to local organizations, like the Chamber of Commerce