5. Reciprocate LinkedIn 'Endorsements'
LinkedIn Endorsements let others highlight the skills you're known for. When a connection visits your page, he or she can vote up one of your areas of expertise or recommend a new skill for you to add to your profile.
Revisit the Skills section of your profile to add ones you want included or delete skills that may no longer be relevant. You can also remove unwanted endorsements by clicking the arrow next to the people who have endorsed that skill, then selecting "Hide endorsement."
And return the favor: "If a client does a great job on a proposal, why not take five seconds to endorse their hard work," LinkedIn's Williams says.