Interviewing Tips from professionals:
1.) Don't rely too much on the Internet to help you find jobs. Come to companies when they are NOT hiring to make an impression. Don't worry about "bothering" people. Professionals may be busy, but that doesn't mean you shouldn't follow up with them.
2.) Thank you notes are a requirement! Hand-written notes are best. Let professionals know if you are extremely interested in the job. These notes make more of an impact than you think.
3.) Preparation for an interview is crucial. Take time to research information about an agency's clients.