If you haven't yet registered to get access to the jobs, you can do it here. You just need to be a current admitted student to get access to the jobs. Put together a one-minute pitch about yourself, your major, your interests and what you can offer the employer. You will find you only have a short amount of time to provide a brief summary of your qualifications and interest. Have a few good questions ready to ask employers - they'll show that you've checked on the jobs and the employer.
First impressions are important.
While this isn't a Career Fair, you still create an impression. Wear your best school clothes. If you are interested in internships or degree-related positions, got the extra step and wear professional attire. Every contact you have with an employer is like a mini interview. Never take food or drink to an employer's table.