"Wives need consistent proof of change over a period of time in at least three areas before they will believe their husband's commitment: careful listening without justification or argument, quickness to admit error, and patience with her doubts."

--Gary and Norma Smalley, It Takes Two to Tango

A key word above is "consistent." She needs to know the change is for real and not just an act. There's no way to prioritize the three areas mentioned. They're all necessary, of the same sprout, which is focus on her and her needs and not your ego.