It sometimes seems that small things play a very central role in our lives.
Has not I had this small phone call of this annoying person, my mood would have nto worsen.
Have not I eaten this cookie, I would have not felt so bad about myself.
If not this sad song in the radio, I would have not gone so badly.
It is very impossible to manage many little things (although we some times got to).
But this is not the point.
If you find yourself bothering about the small things, you have not got the point.
There are many times bigger issues that you do not know or ignore. Concentrating on the small things is NOT a solution. It is many times a delusion
PS. This is rationally. In terms of experience, many people derive great satisfaction from "doing it right" which works even for very very small things. For others it creates a feeling of order and coherence. (like when cutting the cake exactly may creates some joy)