The practicalBIM Revit Wiki is where I keep the things I've learned about using Revit in an Architectural practice.
It hasn't really been kept up to date since 2019 so some of it will not be relevant. However you may still find useful information here. I recommend the use of Search to find what you are looking for.
REVIT INSTALLATION and ADD-INS
This site has been updated from classic Google Sites so may contain messed up formatting and broken links. Thanks Google for replacing something that worked well with pretty but shallow candyware.
UPDATE: Undersized images now fixed.