I really enjoyed this video from Lewis Howes. Lewis wrote a book called LinkedWorking: Generating Success on LinkedIn the Worlds Largest Professional Networking Website.
The video, entitled "Eight ways to use social media," is concise, effective, and very appropriate. Definitely worth the less than 6 minutes of time to watch. It went by so fast, I watched it again and wrote down the list of top 8. Don't go by my list though - you'll enjoy the video.
Eight ways to use social media
1. Be yourself
2. Get active (Facebook, Twitter, LinkedIn) & niche sites
3. Provide awesome content that brings value to the reader
4. Be smart with your time (social bookmarking sites)
5. Be consistent
6. Promote others (LinkedWorking (Lewis Howes), Trust Agents (Chris Brogan))
7. Connect face-to-face to build strong relationships
8. Thank others for their inspiration, support, guidance, content, etc.
I think I may buy his book.