Just another day wasted...

I sit here, watching yet another Sopranos rerun, waiting for something to happen with my life. I've come to the realization that it's not just going to "drop" in my lap. Damn. I was really hoping to wake up one day living in New York City, my dream by the way, with a corporate job doing I don't know what, living in a badass SoHo apartment, sipping on espresso at my local coffee shop where all the "cool" people hang out . Oh well, just another day in my bland life. But at least I make the best of it. My question is, at what point in your life are you supposed to know WHAT you want to do with yourself? As I stated earlier I've daydreamed about having a corporate job, but deep down nursing seems right up my alley. And of course I've always loved the law, so being a Lawyer would be great too. But it all comes down to....IM 30 YEARS OLD!!! And I still haven't figured it out yet?! It's like I'm in 6th grade all over again, when they make you write a report on "What you want to be when you grow up". Im right there with those 12 year olds, yet I can't even stick with one thing like they can. Im all over the place. So at what age is it too late to make up your mind? I still have 4 years of schooling to look forward to,  and 31 years is just around the corner. Is it too late for me?