Ok, windows “hacks” I use at work.

There’s a setting in windows that opens snipping tool when print screen is pressed. This allows to select a screen, window or a rectangle. More than that, it also has screen recording functionality. Very good for quick screen grabs with no additional software required.

Useful for multilinguals out there. Windows (and some linux distros) have an option to bind keyboard layout selection to open windows, meaning alt+tab’ing no longer requires switching between languages.

EDIT:
A phone thing. Some keyboards have whitespace and backspace drag functionality, that allows to move the cursor or highlight and delete text without blocking your view with your fat fingrers.

ANOTHER EDIT:
Having a mouse with at least two thumb buttons is a god send. Moving backwards and forwards between application pages is very useful.

Also, for devs. Go through you IDE shortcut settings and configure (ctrl|shift|alt)+click shortcuts. Having mouse controls to navigate between declarations, usages and implementations of different code elements with intention is awesome.
In the same vein: ctrl+(f|r) and ctrl+shift+(f|r) for find or replace in file or whole project respectively is really common use case.
Have multicarret shortcuts that allow edits in multiple lines at once. Don’t forget to add shortcuts like alt+(up|down) to move selected lines up and down.
Configure shortcuts for code folding like ctrl+numpad+ and ctlr+numpad- to expand and hide current block or combine with shift to manipulate the whole file.
And for gods sake use home and end keys, combined with ctrl and shift it allows for efficient navigation and selection within a file. Combine it with multicarret support and ctrl+side_arrow_keys and you have a way to sync multiple carrets and efficiently edit multiple lines.

Finnaly: f1 – help, f2 – rename, f5 – refresh / run, optionally with ctrl, f11 – fullscreen, f12 – devtools.