You probably know that you can use Command+Space and then type the first few letters of an app’s name, then Return to launch it when it appears as the top hit. But you can also use the initials of multi-word app names. So qp for QuickTime Player, fm for Find My and mw for Microsoft Word. It even works with gb for GarageBand, recognizing the capital B in the name.
Learn how to create a Shortcut on your iPhone that you can activate with your voice to turn on Do Not Disturb. The Shortcut will then ask you for a number of miniutes and automatically turn off. You can also set it to activate silently as a Home screen icon.
When playing a video in Safari on your Mac, you can Control+click on it and select Enter Picture In Picture. But this doesn’t seem to work on YouTube videos. When you click on a YouTube video, you get a special context menu from YouTube instead of the default macOS one. The trick is to leave this context menu there without selecting anything, and then Control+click the video a second time to get the macOS context menu with the Enter Picture In Picture option.
If you want something faster than an external hard drive, and better than a USB Flash drive, you can build an external SSD drive with an SSD and an enclosure. I built a 256GB USB 3.1 external SSD for less than $70 that works great on my Mac. Learn how to build your own.