I was lucky enough to know exactly what I wanted to do when I was growing up. I think one of the hardest things to figure out in life is what your calling is, and what truly makes you happy - not what you want to work at, but what you want to do.
I always say, decisions I make, I live with them. There's always ways you can correct them or ways you can do them better. At the end of the day, I live with them.