Having finished up recently, I'll say when looking for colleges, know all the bases.
- Know what you want to take, and see what types of courses the school needs you to take, and they won't all be the same.
- See if they'll give you any scholarships based on past academic or social achievements.
- Check the entrance requirements--are you an ideal student? Do they need essays or entrance exams?
- Visit the college. Can you live in this area for up to four years? Are there things to do around campus? Off campus? Ask lots of questions if you find that they haven't answered what concerned you the most.
That's about it. Good luck on your search.