Getting users, especially salespeople, to really use the CRM system is one of the most important parts of implementing a CRM system for an organization. There are numerous examples of CRM systems with lots of great features that just have not been used by sales people which causes the data in the CRM system to be incomplete and hence not very usable.
I am a big fan of computer games, currently Battlefield 3, and one thing many computer games excel in are that they are really good at user adoption, it is really the basis of it all. Without it, they just wouldn't sell. There are ongoing trends in the business to "gameify" business applications to make them more fun to use and hence makes user adoption a lot better since you are makeing users really want to use the CRM-system.
One of my fellow MVP:s, Pablo Peralta, has been part of bringing forth a great new product, called CRM Gamified which brings some of the principles used in computer gaming to Microsoft Dynamics CRM. Let your sales people compete in getting point for different task in the CRM system and have dashboards showing the leaderboard. So, do have a long a deep look at this addon. It could litteraly change the way you do CRM.
MVP, CEO and owner at CRM-konsulterna AB