Desktop Stacks

If your desktop gets cluttered:

Right-click the desktop
Choose Use Stacks
Files auto-organize by kind (images, documents, screenshots, etc.)

Text Replacement

System Settings > Keyboard > Text Replacements

Set up shortcuts that expand into full phrases:

Shortcut	Expands To
`@@`	`your.email@example.com`
`addr`	Your full address
`omw`	On my way!
`sig`	Your email signature

These sync to your iPhone too.

Rename Multiple Files

Select multiple files in Finder
Right-click > Rename
Choose: Replace text, Add text, or use a Number format