Forgetting is one big issue. Believe it or not, whether you like it or not, human can't forget. I mean you can't easily forget things except you are suffering from senile symptoms. That one you can't help it - lah. You will definitely forget everything. But, purposely forgetting everything is a big NO.
Past is a major distraction in moving on in your life. ALWAYS. Like a pain in the ass. It will not go forever and it will stay just the same. Dealing with your past times can somehow release you from your suffering.
How am I dealing with my past?
I get mean!
Perhaps I get even.