Back when I was a younger guy I frequented ski slopes in Canada. One of my instructors told me something that I found very helpful in auto body repairs, spray painting and many other challenges that I've dealt with since. My ski weeks consisted of ski school because I wanted to improve my technique and the concept that drastically improved it was the instructor saying "Transfer your focus from your feet to where the ski contacts the surface." With a little practice I was able to do this and it took me from a novice to almost an expert in a very short time.
In auto restoration this same concept applies in many ways. When board or block sanding you need to transfer your focus to the place where the tool contacts the surface. Watch and feel the action and it's effect on what you're doing and adjust your position, pressure, angle, grit etc. to get you the result you want. Early in the filling process it's not as critical as it is later when the more slight variations in the surface are more difficult to decipher.
When spraying paint you need to focus on the texture of the paint you're applying to the surface as it's being applied. One of the things that a supplied air breathing system allows you to do is to relax and enjoy the experience (and the challenge) of proper spraying without being uncomfortable or having to move or leave the room too quickly to save your life.
When color sanding and polishing hardened paint into a beautiful glass-like surface you need to be quite aware of the results your actions are having on the surface. The right tools, materials and techniques all have a place (or places) where you should be focusing your attention and that is almost always where they are most effecting the finish you're trying to achieve.
I hope you can get as much from this focus as I have over the years. It can help you in many ways.
Another thing that made me ski better was that the pretty Canadian girls were hanging with the guys that could ski well. Opps! I lost my focus.