"Today is the first day of the rest of your life".

How many times have YOU heard that line? I hear it everytime I tell my Pop about a particularly bad day. I find myself saying this to my daughter as she flounders in her newfound adulthood status. It's hard to explain - the past is just that - The Past. It's over, it cannot be retrieved or changed. Begin with now. You may have to make some amends or apologies or whatever term you use for fixing the mistakes of the past.