How do you know what's the full potential is?

You're right. I don't know if there's anything further than what I currently perceive, but this is definitely orders of magnitude better than before I started.

And that's pretty much the only thing that has changed (other habits haven't changed, such as meditation and weight-lifting).

Okay, the last one - quasi-trolling on HN IS the exciting things to do :-)

It must be frustrating when you run into threads like this, though.