Not my current therapist but one I saw briefly when it was mandatory to see the psychiatrist I had at the time: she tried that whole, "imagine yourself at ten or whatever age is sitting next to you, now say the things you say about yourself to her/would you say those things to her" (can't remember exactly how she worded it)

I just stared at her disdainfully. I'm not ten, I'm an adult, of course I would not say those things to a child. Those things don't even apply to myself as a child. What's your point? Am I supposed to feel guilty or something? I don't. This is me telling myself to go hang from the jungle gym or accidentally hit people in the shin with the skip ball or whatever it was I was doing at that age.

I'm sure I could think of other techniques that have been utter lead balloons for mental health professionals but that's my favorite attempt at borrowing straight from Psych 101