When you make the decision to go to college, the first thing you have to think about is what major you're going to have. It seems like an easy enough decision, just look at the things you enjoy and the things you're good at. Bam! You have a major. Once you're actually in college, you take classes for your degree as well as general education classes to make you smarter and teach you the information you'll need for your job one day. Hopefully you're able to get an internship and figure out what your field is actually like and where your place will be.
But, what happens if you don't get that internship? What if you take all of these classes, and spend all this money only to find out you don't really like the area you got your degree in? The panic sets in and you have to make the decision to either stay in a field you really don't enjoy, or start all over again.
Luckily, those are not your only options. The majors offered in colleges today are so versatile that you aren't limited to one or two options. For example, I'm a Mass Communications major, but that transcends the traditional "oh, she's going to work for a newspaper" point of view that most people have. I could work in event planning, television, crisis communications, the options are limitless. If you're feeling stuck, take some time to research different kinds of jobs your degree can get you that you normally wouldn't have looked at. Apply for internships in areas loosely related to your field and try some new things.
If that doesn't work, consider taking classes part time to get a minor. This way you have the piece of paper that some employers need in order to hire you, and you have more options than the one on your degree.
No matter what, never forget that your degree doesn't tie you down. Use the general education classes you took and the clubs you joined to expand your horizons and find the thing that makes you happy.