Selecting the appropriate schools to apply to, though not easy, will ultimately save you much hassle and frustration. Here, several factors in finding that match will be discussed.

First, you want to select schools within your estimated range of ability. Usually the college counselor will be best be able to help you with this aspect. It doesn't make much sense to apply to the Ivy Leagues with a 1000 SAT and 2.00 GPA, for example. One possible guideline is to first classify schools into three types:

1.) Safety schools - schools where you are a virtual lock to get in based on your qualifications
2.) Good matches - schools where you have a pretty good chance of getting in
3.) Reaches - schools that are a bit out of your reach but that you still have a chance at

You must have at least 1 safety school in case the whole world goes nuts and you don't make it into any of the other schools. Again, better to play it safe. You want a few good matches, say 4 (or more). And, depending on your personal preferences/ambitions, you may want a few reaches.

The number of schools that you apply to will depend on how much time you have (or want to spend) and how much money you have. More schools = more time spent filling out forms and more money spent submitting to colleges. Minimally, you should apply to 2-3 schools, at least one of them being a "safety."

Other factors in applying to schools include (1) geography, (2) tuition, (3) social life, among others. As for (1) geography, consider whether you want to be FAR away from home (on the opposite coast), within driving distance, or right next door. The best way to test your geographic preference is to go to a summer camp far away and see how you enjoy that experience. When considering the (2) tuition, remember that most schools give quite generous financial aid so never rule out a school simply on a monetary basis. As for a factor like (3) social life, this is very much tied into the geography - a location in the city will probably result in a much vibrant atmosphere.

When all is said and done, however, nothing gives you the feel of the school quite like visiting. Spring break of junior year is a prime time as is the fall of senior year. If you can arrange to stay overnight with a student, that would be even better to get a more realistic comprehension of the institution.