Lessons learned documents include what type of information?

The lessons learned document includes what was done right, what was done wrong? what else should we have done differently.  It also includes causes of the issues, reasons for change requests, etc.  you would also include, preventative-methods  re estimating methods, issues the project faced and reasoning behind it.  

It should include, three sections.

Technical aspects of the project: what was done right, wrong and how the work was completed.

Project management: how did we do with WBS creation, risk planning etc.

Management: How did I do with communications, and leadership as a project manager.