Using the keyboard shortcuts will improve productivity a lot more. So we highly recommend using the keyboard shortcuts to save time and money. Noth...
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You missed two big ones on Windows:
Alt + Tab allows you to switch between all applications, not just 2! There's also Windows + Tab which works in a very similar way, but allows you to also switch between virtual desktops.
Fun fact, if you've got a touch-screen, you can get to the same app-switcher UI by swiping in from the left side of the screen. The really neat part is that this even works in many full-screen applications that otherwise capture all keyboard and mouse input (for example, VirtualBox in full-screen mode).
In Windows Ctrl+V is paste and Ctrl+P is print in most applications.