For me personally, it's been a bit frustrating watching other students with AP credit taking the intro chem and bio classes and just acing them without even trying, because I didn't have the AP option at my high school.
But last semester, for example, in intro chem, I was very disheartened for the first half of the semester because everybody except me seemed to know all the material! But, like other people have been saying, about halfway through the semester, they stopped having an advantage because they no longer knew the material. I, who had developed a college-level work ethic and knew how hard I needed to study, was then finally granted an even playing field because they suddenly started doing poorly on their exams while I set the curve. In the end, I got a 100% on my chem final even though I had no legitimate chem background, just because I learned how to work hard.
Moral of the story: it may be hard at first to watch your peers sleep through class and get great grades, but it will definitely end up catching up to them. If you don't let it get you down and figure out a way to rock those classes, you will be just fine 🙂