Guy Kawasaki is a venture capitalist, blogger, public speaker and former evangelist for Apple. He helped sell Apple's concept and products to developers in the 1980s. Now he blogs frequently, tweets constantly with over 800,000 followers, and is very active on Facebook, LinkedIn and Google+. He writes books on success and social media. His latest, Enchantment, discusses influencing others ethically. He teaches that businesses need evangelists and experts in social media.