[Adamantcheese]

In an effort to be as unproductive and productive as I could, I built a robot once that just pressed the 5 button on my mousepad avery ~1.2 seconds or so. This let me, over the course of 30 days of straight button pressing, successfully accomplish a goal in a video game without triggering their macro detection. It also burned out a few LEGO motors and gears, but that's a minor thing to pay for not having carpal tunnel.

But to actually answer your question, I have a mouse set up with a few macro buttons. One is alt+tab and the other is alt+tab+tab, which lets me switch between the last 3 visited windows very quickly. Usually I'm using it to switch between a project program and its documentation. The last one is bound to windows+lshift+s, for quick screenshots.