Big schools and small schools
A lot of people go to big schools, and sometimes a big school isn't exactly what you want. I went to a smaller school because it felt more comfortable to me, and those kinds of things fostered my learning environment, and that's what I would stress to any person in high school, even younger than that. Find what's going to be comfortable for you and what's really going to press you.

If you're into language arts and you're getting forced into a school that does engineering, it's not going to be a good match. Find a school that's going to be really good for you and that's going to push you to go to the goals that you want to get to.