As a senior in high school you look forward to a fairly laid back year, other than one big obstacle, applying to college. The process of deciding where you want to go to school can be pretty daunting, it shouldn't. Focusing all your effort into getting into one specific school isn't necessary. Not getting into the school of your dreams isn't going to ruin the rest of your lives, plenty of other schools offer the same education and degree your looking for. It's you as a student that decides how beneficial college is for you, not the prestige the name of the school has. Instead the focus of someone applying to schools is to make sure you give yourself options. Don't put all your eggs in one basket, decide what you're interested in, then apply to a few schools that offer what you're looking for. Don't procrastinate though, from personal experience, that makes the entire process infinitely more stressful. You'll feel much better if you apply early and don't have to worry at all about meeting
Deadlines. Don't let yourself get attached to one school, truth be told it isn't that important where you go. What's important is you, what you put into your college experience. It's up to you how much going to school impacts your life. If you put in very little you'll get very little out, if you apply yourself then you'll end up giving yourself a chance for success.