I would define more living or truly living as living the Good Life. What that looks like is the fundamental question of philosophy, but I think a component we haven't touched on yet is helping others. I don't think we should help other people because it gives us a happy experience, but because it fulfills who we ought to be.
Absolutely, that'd lead you to as many partners as possible while discouraging birth control. Plus tangentially it'd incentive trying to reduce the number of children other people have to increase your share of the gene pool. (Which I think is one of the paths you were getting at with eugenics)
It's all up to the individual. Whatever makes your motor run. But I'd universally suggest traveling to other countries to experience different cultures first hand. Other than that... Just interact with and experience as many new things as you've got the bandwidth for.