LinkedIn has become the largest social network for business by far and only continues to improve their functionality and their tool sets to make connecting with people, doing business, and finding new jobs easier. LinkedIn is a fabulous business networking tool and should be utilized to the fullest to maximize your business development activities. You should be spending 1-2 hours per day on LinkedIn to get the most out of it.
via 13 Strategies to Maximize Your LinkedIn Usage and Effectiveness.