LinkedIn can be a powerful tool for showcasing your skills, displaying recommendations and getting noticed by employers -- but it's no good trying to game the system, writes Joshua Waldman, author of "Job Searching With Social Media for Dummies." Cramming your profile with keywords will take you only so far, so it's important to get serious about social engagement if you want to stand out. "If you truly want to get found, build a strong network," Waldman advises.

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