Here are some of the keyboard shortcuts and usage tricks I find useful when using Windows.
Win + V: Open the clipboard showing all your previous copy items. You can now pick a copy item from far back to paste by clicking it.
Win + Tab: View all tasks and virtual desktops. You can also add a new virtual desktop from here.
Win + Ctrl + Right/Left: Switch to next/prev virtual desktop.
PrtSc: Take a fullscreen screenshot and copy to clipboard.
Alt + PrtSc: Take a screenshot of the currently active window and copy to clipboard.
Shift + Win + S: Shows 3 screenshot options to pick from: rectangular, freeform and fullscreen. The chosen option is copied to clipboard.