Did you know... You can use Shift+ESC to close a tool window - #142
And as I've said time and time again on this blog, it's really the simple things. I keep forgetting about this tip, until i see this shortcut chord and have to look up what it does.
Use Shift+ESC to close the currently-selected and active tool window. If the focus is not on a tool window, but in an editor, and you press Shift+ESC, VS will just look at you.
If you want to close the current editor... stay tuned for tomorrow's tip!