Learn it well

If you're going to be a high achiever, you're going to be in lots of situations where you're going to be quickly making decisions in the presence of incomplete or incorrect information, under intense time pressure, and often under intense political pressure. You're going to screw up -- frequently -- and the screwups will have serious consequences, and you'll feel incredibly stupid every time. It can't faze you -- you have to be able to just get right back up and keep on going.

That may be the most valuable skill you can ever learn. Make sure you start learning it early.

The Pmarca Guide to Career Planning, part 2: Skills and education (Marc Andreesen)