The best laid plans of mice and men often go awry.  

You've made some intentional plans. You've made hard choices to determine what is actually important in your life. You've said no to good things, things you want, in order to preserve your focus for the things that really matter.

But, the best laid plans of mice and men often go awry.

So we come to the next aspect of saying no to ourselves. 

The issue of discipline.