Klout was once a topic of controversy, but these days most social media experts and digital marketers agree that your Klout score matters, especially if you're connecting with customers or hunting for a new job. Given Klout's importance as a social media metric, what, then, can you do to keep your score climbing? Here those experts — as well as Klout CEO and co-founder Joe Fernandez — offer their tips to improve your Klout score.