Marketing and computer people beware!
Of course along the way, as you are deciding what line of work and what industry you want to be in, you have to start or keep building your resume. Just going to school and graduating doesn't cut it anymore. Hiring managers want to see that you actually have an interest in their industry. You must have related work experience, whether it be a real job, an internship, or campus involvement. The more, the better, obviously. If you can fill a page, that's awesome! Not only does it show employers that you are interested in the field, it shows YOU if it really is what you thought it was. I knew people who changed their major after experiencing work life while doing their internship - at least they noticed that it wasn't all they thought it was before it was too late to make a change.
There are resources on every campus that will point you in the right direction. At Cal State Fullerton, for example, there's a website for student clubs. You'll be surprised how many clubs there are - there is something for every interest, no doubt!
If you're looking for an internship or a job, visit your career center. Every university should have one. Every career center has staff specializing in certain industries - make an appointment and talk to them! It's free and gives you valuable insights. Cal State Fullerton's career center looks like this:
My personal favorite tip: Conduct informational interviews. They don't get you jobs, and do not ask for one, but they really give you the chance to ask questions and they do give you face time and a chance to build your network.
Along these lines, you also want to make sure you take classes that directly relate to what you aspire to do for a job. Don't take classes just because they're open or fit into your schedule. Take classes that will actually help you. And then attend them with a positive attitude, knowing they will actually help you in real life. Think beyond graduating - that's why you're in school! Here's a tip: I really wanted to take a theory class, but I didn't need it to graduate. So instead of putting extra work on me, I am simply sitting in to listen and learn. No exams, no book reading, but I do get the knowledge I want. That was easy!
Now go and be successful - in the right kind of job you'll love!