Hey I found this nice article from youngentrepreneur.com and thought of sharing it with you.
If you know your social media well you will realize that linkedin is a great tool for building powerful networks. You must play the game well and analyze groups and join them based on what value they provide. You need to plan well in advance and set your goals and your target market. You need to participate in discussions and be a regular contributor to really make an impact and build up lasting relationships.