Excellent questions my friend, and definitely questions that I've asked myself as well... the answers are completely personal, no doubt.

Regarding work... 80/20 applies very much so to wealth building and from what I've gathered people who are highly successful on that field operate with it too.

Spend 80% of your time working on your needed on what pays the bills
spend 20% of your time building wealth.

I've been told that before as advice...