This is a great question, sometimes the best way to prep for an interview is by noting all the things you shouldn't do. One of the biggest mistakes you can do during an interview is check your phone.
Helpful tips for Interviewing:
Make eye contact
Bring extra copies of your resume
Know your resume really well
Tell stories to explain your work experience
Dress for the job you want
Bring a notebook and pen, and take notes!
Ask the interviewer questions
Know the job you're applying for
DONT Check your phone
Try to have a conversation instead of an interview
Another tip, the interview starts from the moment you step into the building until the moment you leave, remember to stay 'on' until you've left the building.
Check out this article for more information: http://www.popsugar.com/smart-living/Dos-Donts-Job-Interviews-34040192
Hope this helps!