How to go about exploring ego and/or dark emotions/experiences in a healthy way?

[AnthroHeart]

When you think about the nightmare you had, does it still evoke fear in you?

I think humility, being humble is a good way to deal with ego, which you seem to have.

When I think about it, I like to think about the day I had, and ways I could have done better.

Much of what ego does is unconscious I believe. If we can make its workings conscious, then we can better deal with it.