What I tell most of my interviewees is that it is perfectly ok not to know what you want to do out of college. Use the company to figure out what you want to do and move into something that makes you excited to come to work everyday. One Director once said that the Degree wasn't important (Biology, Mechanical, Chemical, Biomed, etc.), if they are a scientist, once they get in the industry, they will learn the business.
My advice is when you are in you BS program, try and keep your options open and take a broad range of classes in addition to your degree. And intern or co-op as soon as you can (through the WISE program we bring people in the summer before their freshmen year of College). Intern every year, and apply for internships as soon as possible (look in September). You get paid well, you figure out what you want to do, and you build your resume.