Mine is using the arrow keys to navigate typed text while writing and editing. It helps speed things up, versus having to move your hand to the mouse to navigate.
Use the Up and Down Arrows to move/jump vertically.
Left and Right Arrows to move/jump horizontally.
Combine Left or Right Arrow with Shift to be able to select text. Use Up or Down Arrow with Shift to quickly select whole/nearly whole sections of text.
Combine Control with Left/Right Arrow to jump whole words to more quickly move to where you want to type.
Actually use Home and End keys to get to the start and end of text.
Ctrl + F for searching text. Very useful.
Alt + Tab for window switching.
Linux + USB drive to switch away from Windows.
Combine home and end with ctrl to move to the start or end of the file. As a dev I use this a lot.
I also have keyboard shortcuts for code folding and mouse shortcuts to navigate between usages, declarations and implementations. Onboarding people is a slog when they don’t have the same shortcuts.
I can’t live without my home, end, pagedown and pageup keys