A useful keyboard shortcut, that appeared in Win 7 and later.
Hold the Windows key and press Home. Only the active window will remain on the desktop, and all the rest will minimize to taskbar. It’s not too convenient my laptop, as Home is accessed via Fn button. So it makes pressing 3 buttons instead of 2 for me.
You may also just hold the mouse button on the needed window and jerk the mouse a little bit for the same result.