I don't have many memories I can go back to that are positive, like most of the people here I recall bad things vividly, I have started to replace them with random imaginary thoughts of other things that are happy or random or different, it was hard when I first started the bad memories were tough to shove aside and kept coming back up, but over a span of a few years it gets easier to just find something better to think about, or sometimes I would just stop thinking and live in my moment, look at the sky and think nothing.