These are the core elements of my system, so to speak – core foundation; in the sense of [1] Munger's latticework of models.
It's my system for achieving [2] eudaimonia, or most specifically – [3] sophrosyne.
For myself, the root was the solid sleep – from there on, the other pieces started fitting together in an organic way.
Shortly – quality sleep over consistent period of time gives you the ability to make good decisions.
Cheers!
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[1] https://www.farnamstreetblog.com/mental-models/
[2] https://en.wikipedia.org/wiki/Eudaimonia
[3] https://en.wikipedia.org/wiki/Sophrosyne