How do you let go of humiliating memories?

During some manic episodes, I’ve really made a fool of myself, in one case in a front of quite a lot of people who didn’t know I had bipolar (a training course with a group of (thankfully) strangers). These memories still haunt me even though quite a bit of time has passed and the people who witnessed it probably don’t even remember. Every so often, the memory/humiliation hits me like a stab in the chest and can ruin my day.

For those who experience this too, what helps you let go of these memories and stop thinking about them?