Guy Kawasaki was one of Apple’s first employees, and marketed the Macintosh in 1984. This talk is based off of his book of the same title. Although a long video to watch on your computer (40 minutes), Guy has a lot of insights that you won’t want to miss. This is a must watch video for startups.
You can keep tabs on him via twitter @guyKawasaki, but be warned… he tweets nonstop.