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.
Add Home/End buttons into your work flow to jump to the start or end of lines. Works with holding Shift as well.
For me, one of the biggest things was removing all the visual noise from my desktop. Disable notifications, disable or hide unused taskbar elements, and on Windows, get rid of the patently awful ticker thing that lives on the taskbar. Disable window animations.
I did the same thing on my phone, too, including disabling pop-up notifications, toasts, floating bubbles, and animations. My brain is much happier for it.
Works with Ctrl too