Final Cut Pro - Option-clicking
Option key magic - all in one simple rule. Read it here.
Andrew Balis once described the Option key as the "opposite" key. Holding the Option key while doing something often does just the opposite.
For example, Option-clicking an Audio Mute, Audio Solo, Visibility, or Auto-select button turns off all the buttons, except the one you click.
Option-clicking the same button again turns them all back on.
This is MUCH faster than clicking each button manually.