The umbraco documentation wiki is community driven documentation effort for Umbraco. Content is both submitted by The core team, the MVPs, the umbraco corporation and ofcourse anyone else in the community who wishes to contribute.
Minimum requirements, How to install on Windows 7, Handling folder permissions, Use Windows Platform Installer
How to add new buttons to TinyMCE, How do I move documents, how to rollback changes
What is XSLT? how do I migrate my html? what about css?, how do I create forms?
The Umbraco API, the Event Model, how to extend the backend, how to integrate 3rd party data
How redistribute, how to write good documentation, the package format etc, installation actions