Like any social network, LinkedIn puts a high premium on activity. So it's a good idea to update regularly, according to Wayne Breitbarth, author of "The Power Formula for LinkedIn Success: Kick-start Your Business, Brand, and Job Search."
"Your network will probably lead you to your next great opportunity," he says. "So it's important to keep your smiling face and relevant business-related comments in front of them on a consistent basis."
But don't go overboard. A few updates a week, up to once a day is plenty. Remember to stick to business, and if possible, make your updates useful.
Also try joining relevant groups and participating in the conversation. "Joining groups within your profession or industry can do two important things," says Karen Southall Watts, a business trainer and career coach from Bellingham, Wash. "You can establish a reputation for being informed or an expert in your field … by freely sharing your ideas and wisdom. But you can also use those discussions to learn from the thought leaders in your field."
But Watts says to remember to keep discussions professional and substantive. Asking how to find a job isn't helpful, but asking something specific about the industry is a great way to showcase your professionalism.