Never ever lose sight of the big picture. It is easy to get bogged down in small meaningless details and minutiae and lose sight of the ultimate objective. This is particularly the case in this age of uber specialization. Instead look for connections, step back and take a look at the rhythm, tempo and flow of the movement.
It is not about individual muscles or small parts of a movement, it is about how everything links, syncs and connects in a coordinated manner to produce smooth flowing movement. Respect the wisdom of the body and put it in position to make the required shapes and change those shapes as needed. Movement is a symphony and you the coach are the conductor.