I feel like it moved a full standard deviation, but with no real way to measure it, no controls and no documentation it's all guesswork. Still, I can point to certain behavioral changes that haven't regressed in the last 6 months (and a couple surprising ones at that) when I made the change.
The destination was high conscientiousness, but the direction from where I was was a higher sensitivity to disgust. Mainly disgust at myself and my living space. Cleaning the clutter around me and myself more frequently was a sign I was on the right track. Not quite OCD, but on the way, still a ways short of disrupting my life.
I outlined a plan (as if I made a reasonable and actionable plan to help someone I cared deeply about) to clean up my act and pinned it right over my desk, then kept to it.
How'd I scare the living bejebus out of myself? YMMV, but psychedelics worked for me. Look up The Marsh Chapel Experiment.
Some more real world actions:
https://www.health.harvard.edu/staying-healthy/raising-your-...
And best of luck to you!