One thing to do would be to get a friend to proof-read the resume because sometimes they may see a mistake. Or alternatively, make sure you rest a day before going back to check the resume.
I recall my first interview process for a real job, meaning not those vacation jobs thing. There is the initial interview, then the call backs for a second. And in between they send you to a room with several other candidates and ask you to do some "project" as they observe how you work together and I suppose whether can you lead. Then there is the "friendly" dinner where you meet with other senior people in the firm and they size you up during the meal.
But it is easy to turn the tables on them especially if you manage to have the cards on your side. If you manage to get an offer or more from another place then you can casually mention it. You can use it to great effect by coupling it with a request that they give you an answer as soon as possible, which can even lead to an on the spot job offer. Of course it all depends on the situation and one have to gauge whether or not you can use it to your advantage or not.
One thing I noticed is that interviewers like to talk about themselves. So it is not all about you.
Good Luck, do not be too nervous. Anyway what type of job are you looking for?