Keyboard Maestro Field Guide | MacSparky Field Guides:

With Keyboard Maestro, you can automate just about anything. In addition to teaching you all of the mechanics of Keyboard Maestro, this course includes a number of walkthroughs of automation workflows you can use, download, or alter to automate your own Mac.

Keyboard Maestro is one of the Mac apps, alongside other automation tools Hazel and Textexpander, that ensure I get 40 hours of work done each week with about 30 hours of effort.