We should always look back on our own past with a sort of tender contempt. As long as the tenderness is there, but please let some of the contempt be there, because we know what we are like, we know how we hustle and bustle and shove and push and sometimes use grand words to cloak it; one does. I'm not looking at you specifically, so don't squirm!
(Dennis Potter, as interviewed by Melvyn Bragg shortly before his death.)
I'm struggling to think of better advice regarding the act of self-evaluation and looking back. If anyone has some wisdom they'd like to share then I'm more than up for hearing it!