In this graduation season, I thought I'd share the best advice I ever received: You can't make a mistake before you're 30.
Granted, there are a few things wrong with this advice.
First, it's ambiguous. The intended meaning is not zero tolerance for youthful error -- quite the opposite. The point is that youth and early adulthood is the time for some -- since I have teenage daughters, emphasis on the some -- risk-taking and experimentation.