Consider using a template such as this (personal questions tab) with your own personal criteria
Some Thought Starter Questions:
Does the college offer a strong program for your likely major(s)?
What size school, do you prefer small or large campus?
What is the location of the school, and do you prefer a city or rural setting?
What is the student-to-faculty ratio, and how large are the class sizes?
What is the tuitiion cost and what finacial aid options are available?
What networking opportunities are available, and what career services does the school provide?