As a high school junior, what are the most important things for me to do before senior year?
By planning ahead, you can be ready to hit the ground running in senior year. Do what you can this year, beginning with SAT and ACT testing. Try to take each twice in second semester. Learn about the options: large v small; urban v. rural or suburban; liberal arts college v. university. Don't "think" you know the differences--take time to see samples of each. Do this at schools near you--you'll learn how to "do" a college visit and be ready for serious campus visits in the summer and fall.