use the evidence that you see to update your model of the world,² and your model of the world to decide which possible behaviours would be most likely to achieve your goals
I endorse this advice. Note however some consider this in itself unethical when it comes to interpersonal relations. I have no clue why.
You know the problem with not outright saying that what you are advocating is actually eugenics is that eventually someone else will do it for you.