I think there is a different approach of our memories like me? that I mostly registered in my mind those happy and good things and tend to forget the negative one .
I know that we cannot completely forget them but at least how we deal on those things are the important part .
For the bad memories, you make sure they doesn't happen again.
For good memories, you make sure that you replicate it.
yeah this is how I uses those , to remember and never let to happen again.