Enabling the new Uikit admin theme
Appending a file and initialising variables
Adding tabs in the page edit screen
Creating grids of fields on the page edit screen
Setting up a global site settings page without a template file
Changing the default classic admin theme to the Reno theme
Templates, fields and creating pages
Processwire fields and how to create them
Processwire templates and how to create them
The (not so famous) processwire 5 minute install