LLRX.com (with its new look) posted an article by Ron Freidmann entitled: KM Best Practices. The article is a summary of a panel discussion he led.
He points out that for most attorneys, the "best practice" is to use the last instance. Attorneys are not known for taking the time to do a post-action review to send feedback to their team or their documents. That post-action review is the key to creating and maintaining best practices.
For my clients, I am very good about reviewing the final, negotiated documents to extract changes that should be made to the original form and updating the procedures memo. I have found this to be particularly successful for the automated forms. I guess if you are saving the attorneys several hours up front, they are willing to give some back at the end.