In Atomic Habits, James Clear sums up the difference between amateurs and professionals: “Professionals stick to the schedule; amateurs let life get in the way. Professionals know what is important to them and work toward it with purpose; amateurs get pulled off course by the urgencies of life … When a habit is truly important to you, you have to be willing to stick to it in any mood. Professionals take action even when the mood isn’t right. They might not enjoy it, but they find a way to put the reps in.”