A lesson from a wise man: Social media is not just about marketing or branding. It's a way of connecting, sharing information and personalizing the interaction of doing business. Plus it's a heck of a lot of fun! I have met some amazing and wonderful people thanks to each medium. Which one although Blog, Facebook, Twiitter and Linkdin are favorites. Digg is creeping up at an amazing rate! Foursquare is even evolving as are others like it such as Gowalla. Bottom line: Use what works for you!