Ask HN: How would you have done high school/college/university differently?

Knowing what I know now, I would have approached high school and college much differently than I did. What would you have done differently? And if you think that your mistake was a common one, what would you change about the system to prevent others from making the same mistake?

For example I didn't take enough risks which I think hurt me in the long run. I'm not sure how to fix that for current and future students but thought the HN community might have some thoughts