Old Dock tips that are still useful
Death of the (+) in web search
Delete previous word or path item in Terminal
App Switcher tricks
“defaults” command tricks
Keyboard tricks in Dock stacks
Delay for hot corners
Custom names for screenshots
Creating human-readable Swift tool with Xcode
The Help menu in complex applications
Hot corners + modifiers
Backing up iCloud Drive
Create a test file of a certain size
Quick open files of a certain type
Simple repeating command-line command
Flow control in bash
Moderately advanced searching in Mail
Shell aliases
Xcode nuclear option
Set up timed or recurring scripts
Sharing scripts between machines
Command-line search with Spotlight
Curly braces on the command line