This is the salient point to James' short essay. How he get's to it is the essay.

Complete awareness of body and mind in relation to the goal is known as 'zanshin'. Literally translated, zanshin means “the mind with no remainder.” In other words, the mind completely focused on action.
Zen Of Archery — by James Clear

http://www.awakin.org/read/view.php?op=audio&tid=2396