<human>: Can you condense the text into a few key points?

I am 19 years old, and have been out of high school for over a year now. I was the kid in high school who thought he was too cool to try hard, and made sure I barely got by; just enough to graduate. College was never something I really took seriously, and I did nothing to prepare myself for life outside of high school. Now, over a year later, I find myself doing NOTHING with my life and I can't stand it. I desperately want to go to college and actually DO something, but I just don't know how to go about it.

The unfortunate thing is, like I stated, I did not do well in high school. My G.P.A was unimpressive, I didn't really do any extra curricular stuff, and I was basically just the "average" student by every definition of the word. My dream is to attend the University of Michigan, and I know they would look at who I was in high school, and never in a million years accept me.

So FINALLY for the question! Are there things I can do now that I am outside of high school, to make a college application ACTUALLY look impressive? Is it possible for me to get into a great school like UofM if I do things to work towards it now? Or did my crappy attitude in high school basically screw my ENTIRE future like I was told it would? I cannot look back on my life in 60 years and consider it a success unless I go to this school.
<bot>: I was a crappy high school student and I am just now starting to realize I screwed myself hard. What steps can I take NOW to actually provide myself with a future and attend college?