Personal favourites:
- [Raycast Window Management](https://www.raycast.com/core-features/window-management) to resize windows dozens of times per day.
- Text expander (Raycast or Expanso)
- `CMD+T` New tab
- `CMD+W` Close tab
- `CMD+L` Go to address bar
- ``CMD+` `` Switch between active windows in the current application. Good if you have a lot of browser windows open.
- `CMD+S` Save
- `CMD+Option+1/2/3` Apply heading style in Google Docs
- `CMD+K` Add link in Google Docs, and many other apps
- `CMD+Left/Right arrow` Move to start or end of paragraph
- `ALT+Left/Right arrow` Move to start or end of word
- [Gmail shortcuts](https://inboxwhenready.org/gmail-keyboard-shortcuts/).
Bonus: [dial up your mouse and trackpad speed to the maximum](https://support.apple.com/en-is/guide/mac-help/mchlp1138/mac). It'll take 30 minutes to get used to it, and you'll never look back.