There are two components that are fundamental to enjoy life and feel good about yourself: continual learning and service.
Money doesn't change you; it reveals who you are when you no longer have to be nice.
Someday is a dis-ease that will take your dreams to the grave with you.
Language learning deserves special mention. It is, bar none, the best thing you can do to hone clear thinking.
It's not enough to have the right answers. You have to have the right questions.
Personal branding is about managing your name - even if you don't own a business - in a world of misinformation, disinformation, and semi-permanent Google records. Going on a date? Chances are that your "blind" date has Googled your name. Going to a job interview? Ditto.