Heading in to senior year of highschool.. any tips or advice you can give me about applying for Uni?

Make sure you start EARLY! College want students with the best grades, so keep them up. If you're going away for college, make sure you visit the campus. Make sure you apply to the college YOU want to go to, not someone else. You'll regret it because you might end up miserable. Consider what you want to major and minor in, research you major and minor and the credits you need for it. Research any student groups you may want to be involved in, such as sororities, student government, or recreational activities. And most of all have fun your last year in high school and have fun in college! Hope this helps! :D