Attitude: The key element to successful interviewing is not your experience, your grades, what classes you took, your extracurricular activities, or any of the other basic necessities. Those skills are what got you the interview. The key element to successful interviewing can be summed up in one word: attitude. If you want to rise above others with better experience, better grades, or better anything, you will need to work on developing a highly positive work attitude.
Your attitude determines whether you will "make the cut" or be discarded. Remember, there are plenty of competitors with the ability to do almost any given job-- especially at the entry level. The way most employers differentiate at the entry level is by candidates' attitudes toward the job. Your attitude is often what recruiters will remember when the dust has settled after reviewing ten, twenty, or even one hundred candidates--the one who was sincerely willing to put forth their very best effort. If you have the attitude of wanting to do your very best for the company, of being focused on the company's needs, of putting yourself forth as the person who will be committed and dedicated to fulfilling their needs, you will likely be the one chosen.
Why is attitude so important? Because most companies already have their full share of multi-talented superstars who care about no one but themselves. Ask any manager who the most valuable member of his team is, and he will point not to the overrated superstar, but to the person who has the "can do" attitude, the person who can be counted on in any situation, the person who truly strives for excellence.