These are just simple things that I've found myself looking up how to do at one time or another. I've collated them here without the kind of long winded explanations that are usually found online...
Block nuisance phone calls
Check a file hash
Copy a file from Mac to Windows
Edit Windows hosts file
Find files I've created in Google Drive
Find large emails in Gmail
Free up space in Windows
Take a partial screenshot on Windows
Turn off the Windows Terminal bell sound
Unlock iPad screen rotation