Jack Ma of Alibaba had few advice to various age groups: https://youtu.be/__Mz-oxsXAs?t=116
< 30 Follow somebody. It's not which company you go, it's which boss you follow.
< 40 Work for yourself, if you realy want to be a entrepeneur.
< 50 Focus on things you are good at.
< 60 Work for the young people.
> 60 Spend time for yourself.
~Jack Ma's Advice to The Young People