If I knew what to do with the knowledge I possessed at 20, by the time I reached my late 30s I'd be rollin' in loot and living a very easy going life.
If only I had explored my own potential more back then things today would be so much more different. It is a regret I will live with for the rest of my days. Though it's not too late to try and make something happen, I indeed have less time to do it and less time to enjoy it.
Good article and worth the read.