My first piece of advice is to find some common interview questions and practice answering them out loud! Saying them in your head is way different than saying them out loud. Be prepared to answer the question tell me about yourself. Nearly every interviewer is going to ask you that question. It sounds like an easy question, but is normally your first impression and a chance to let them know you as a person.
Do some research on the places you are interviewing with before you go there. That way you can have some good questions prepared to ask. After your interview send a thank you note. It can be electronically or in the mail. Just send it. It'll set you apart from the crowd. Make sure you have a few copies of your resume printed on resume paper(not normal printer paper). Bring a notepad and a nice pen(nothing that says Hilton Garden Inn or some other brand) and keep it in a nice leather folder. If I know I have some questions going into an interview I will write them down in my notebook. I also write the name of the person(fairly small that way they don't see their name written in HUGE LETTERS) I'm interviewing with at the top of the notepad so I can't forget it during the interview.
Try on your interview outfit the night before that way you are sure that everything fits right and if something doesn't you'll be able to prepare and adjust. There is no need to make yourself more nervous by having a wardrobe catastrophe right before your interview. If you wear jewelry to the interview keep it simple. You don't want to be wearing big bangle bracelets that make a lot of noise during your interview. If you do there is a chance they will distract you, but more likely that is all your interviewer is going to remember about you instead of how awesome your answers are! Practice shaking hands with somebody you trust before. Have them let you know if your handshake is okay. Try and get a good nights sleep before your interview and be early for your interview. Smile and be yourself!! I wish you the best with your interviews Ena!