1. This article covers a lot of ground on your focus
http://osdir.com/Article3992.phtml

2. Serve an apprenticeship with Microsoft Enterpise systems marketing division and learn what they did wrong or right from a marketing view point.

3. Next time someone says "Linux will dominated the desktop", ask them to come along with you "on the beat" on your next sales trip to sell Desktop Linux; we may all learn something firsthand.