Which social network is best for your business?

What it is: The world's largest resume pool; a place to read career-oriented blogs and news articles.

Best business uses: Hiring; networking to reach potential clients.

Who should use it: Everyone, especially B2B companies looking for new customers.

How to maximize your reach: Establish relationships with high-quality potential hires before you're actually hiring, said DiNardo. Join a few LinkedIn (LNKD) groups that relate to your company or market. Once you've established yourself in a group, work to answer questions and foster conversations, which will boost your reputation as an expert and help others get to know your company.

How not to use it: Don't spend too much time pitching your products or services.

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