Why is discipline so hard?

I feel like I need to do a better job at work.  I have struggled with finding my rhythm again after the change in job duties.  It's hard for me to feel like I have enough to offer to patients and the staff and I know I spend too much time in my office.  That only leads to my being fearful and even paranoid that others don't see my worth.  The way to change that is to change my own behavior right?  That's my goal for tomorrow!