Tried real hard, got into the college I wanted to go to (CU - Boulder).
In college, I tried hard also, but I could have done better. I got a job and all, but I ended up hating it and it's possible that with a better GPA I would have ended up better off. Doesn't matter much at this point because I'm going for a master's but still - I'll be working as hard as I possibly can and trying to secure the highest GPA I'm capable of because that shit absolutely does matter in the real world.
I'm 24, so I've been through high school and college and I will sincerely tell you - DO YOU BEST IN SCHOOL, no matter what level you're at. It's important, and it will impact your life very seriously. The people who think it's "not cool" to try hard in school or to do well academically pay the price later on in life. Not to preach too much, but for real guys and girls - give it your all. Years down the road you'll be really happy that you did.