< 20 Be a good student.

< 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

And let them do so. Marriage and kids have downsides as well as upsides. Don't be looking at the downsides so much that you miss enjoying the upsides.