I have a bit of different set up that I think is a bit more efficient than most.
First of all I use Rzer Tartarus, and love it. And move the screen in two whats.. with a little thumb stick and tactical map which I can access with with thumb as well by pressing the button that's right under the thumb stick. Before I had tartarus I used tactical (bound to space) map (bound to space) and middle mouse button.
I use the control groups allot. for types of units. for example when I have a sniper (I never spam them) I always have it bound to 4. All conscripts would hallways be 2. of course the button is useless for controling the conscripts but its great for reinforcing them, either from halftrack or across the map in the base. press 2 and spam f button.
also the units list at the top bar gets organized according to your control groups. Thus when you have all conscripts bound to one button they will all be in the same place. This is useful when you need to quickly find an unit that's afk or something.
Also, all the people who do not use tactical map need to get few slaps in the face I think

not only it is very useful but necessary for some things - one thing comes to mind is partisan spy network. there is no way you would be able to make out all his unit types and position in mini map. It is also very comfortable for positioning your units around the battlefield. for example I can order my units to walk in the most backward way to the opponents cut of in seconds (which means allot of shift clicking different waypoints), while on screen you would have to move your camera and do it much slower and the precision needed is probably not possible on minimap (your units would step onto capture circle and give you away).
srry for the wall of text... I dont even have time to spell check it, I hope someone understand me... LOL
P.S. some people will say that these things are a matter of preference but I will have to call BS on it. There might be room for preference but some things just work better than others. Michelangelo could not have achieved the same work if he used a sledgehammer.