I mean, one shot you treat like you have forty little matches instead of one forty shot match. It makes all the difference in the world. It's easier to just forget about a not so good shot.
No matter how insignificant the thing you have to do, do it as well as you can, give it as much of your care and attention as you would give to the thing you regard as most important. For it will be by those small things that you shall be judged.