getting to know YOU

It's a funny thing to think that we devote so much time and energy to the concept of getting to know the 'other'. Or course the trend also tends heavily nowadays on getting to know thyself, I think this is why Buddhism is having so much success in the last few years. My question is this though, once you know how 'you' are, what then? Because I realize with myself that even though I think I have myself pretty much figured out, I still end up making the same types of mistakes. So what's the point then?

(Just wanted to put that out there......I'm still jet-lagged and can't sleep, hence the existential crisis.....)