LinkedIn launched in 2003 with 4500 members. Today, the site has more than 433 million members and is the world's largest professional network on the internet. While other social media channels are a mix of news, silly photos and viral videos,  LinkedIn continues to be viewed as the largely no-nonsense site for business. For communications pros, LinkedIn can be a great channel to connect with company decision makers, colleagues and journalists. As we gear up for the second half of the year, it is a great time to spiff and polish our LinkedIn profile. This infographic from Mike Dane, PR Manager of TruConversion provides 18 tips to help you perfect your LinkedIn profile. Is there anything you would add? Let us know in the comments!