There was recently an effort to locate and combine all the existing internal Technical Support PSM training materials into one file. The idea was to create a document for a technical support engineer who wasn't familiar with PSM could spend an hour or two reviewing its content and at by the end have an understanding of the basics of PSM along with how to get it installed. To the best of knowledge it is the most concise set of intro to mid-level knowledge available for PSM and I wanted to make it available to the community.
Special thanks to Pat Kulenkamp from Integrity support for putting this document together.
Other resources and the latest documentation links can be found on the main PSM resource page.