Body modding is great and all, but have you tried mind hacking?

Now I'm curious. Tell me about the coolest mind hack you've done that isn't just some boring productivity boost or whatever.

I've trained myself to have something close to perfect pitch hearing, by making use of my hyperphantasia for sounds.

@piegames kinda boring in comparison but: we perfected internal communication

we self-therapized ourselves out of suicidality and hopelessness etc