Comment by mellosouls

Somewhat connected to the approach proposed in this article is something I've found that really helps when I've taken a hit:

Reframe the loss as a learning experience that will save you much more in the long term.

Example: You can read and listen to all the advice in the world, say, about being careful who you lend money to, but when you get stung for $100 by a "friend" that is going to register very, very much more strongly and will possibly save you $1000s in the future as your antenna will be much more effective.

It isn't something that can always be used but being able to see seemingly painful hits as cheap lessons can be quite empowering.