Remember that there is only one important time and it is Now. The present moment is the only time over which we have dominion. The most important person is always the person with whom you are, who is right before you, for who knows if you will have dealings with any other person in the future? The most important pursuit is making that person, the one standing at you side, happy, for that alone is the pursuit of life.
If you're serious, you really understand that it's important that you laugh as much as possible and admit that you're the funniest person you ever met. You have to laugh. Admit that you're funny. Otherwise, you die in solemnity.
Choose a field that will supply sufficient remuneration to provide adequately for your companion and your children. I bear testimony that these criteria are very important in choosing your life's work.