First, he says, it lets you build your own profile within your field by posting your publications and research.

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If you are one of them then you can get the inside scoop about what is coming into your inbox with Smartr inbox from Xobni - a browser plug-in that looks at your email and social contacts to build a profile for everyone in your address book.

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These walls will build up a profile of you and change your working environment accordingly.

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If you are employed and can build out your social media brand over time, raise your professional profile as an expert, and cultivate relationships with executive recruiters, then you have quietly but surely positioned yourself to know about your market and be known to your market without ever actively launching a search.

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