LinkedIn groups are remarkably active, covering a wide variety of mostly business-related topics. Once again, here you can search for groups by keyword such as city name or industry. Look for groups that reach your target audience and get involved. Answer questions, ask questions, and be engaging.

When you join groups on LinkedIn, check the settings to receive daily digest of message board discussions via email. This allows you to quickly scan conversations to see if there is anything interesting that you want to comment on. When you post a comment on a group message board, all members can view your comment and may also choose to view your profile.