I'm a high school senior right now and attribute my success in high school to a dual enrollment program I've been taking advantage of. Basically, I worked it out so that for the past three years my education is supplemented by college math classes. I've also been interning over the past year at a well known company in the tech sector. It's been a lot of work, but it has also paid off. I've learned a ton and haven't gotten bored. When things get dull in regular high school classes (basically when I go to class), I do homework or program.
If I hadn't done the dual-enrollment program, I would have probably taken the proficiency exam and gone to a community college. Instead, I'm graduating with the rest of my class and going to an Ivy League university. I can't emphasize how great dual-enrollment is.