"Know thyself" is the advice that I've followed. When you're younger you tend to have identities and opinions that are like what you were indoctrinated into, and those things are not necessarily you. And so most people are - to some degree - acting out a role, rather than being it, and that saps away ability to pursue anything genuinely. But so long as you still
believe the things that aren't you, you aren't questioning that - you wonder instead "why everything sucks," you have trouble taking things seriously, you wonder how other people seem to get on so much better, and so on. It is a discomfort that is near the higher stages of Maslow's hierarchy, because it requires careful examination of your personality and limitations.
But if you go back and question all of your choices, everything you think you are, then you may make a lot of progress very quickly. That may lead you far away from the goals and identities you have now, or it may give you a slight course correction.
Edit: And high intelligence is in some ways a hindrance to this exploration because it improves your abilities at self-deceit.