I do not see how training and stern lectures can make users stop basing a new document on a similar old one, and force them to start using templates and styles. Even when you pay significant bucks to a skilled pro (with a BA attached to the team to help map organizational needs), the resulting templates and styles will still lack the useful boilerplate found in that similar document you saved last month. And it'll still be easier for users to open up that old document than to try to remember the template and style training they had a year ago.