Specifically thinking of stuff that make your life better in the long run but all kinds of answers are welcome!
I’ve recently learnt about lifetraps and it’s made a huge positive impact on how I view myself and my relationships
Control + Backspace deletes entire words rather than individual characters
Control + Arrows also moves your text cursor by whole words. Combine it with shift and you can easily select a bunch of text without the mouse.
Another one that took me far too long to learn: Shift + Tab will do the same thing as tab (next element) in reverse
Also shift+pos1/end selects whole rows or parts from where the cursor is.
Ctrl + shift + v to strip formatting before pasting (can be application dependent)