Start your own job search file. Keep detailed information regarding your resume submissions, interviews obtained, and your results. Follow-up with a company where you are getting no replies if your interest is strong. There is nothing wrong with being aggressive as long as you remain professional in your approach. Maintain a positive attitude and don't quit.
Quitters never win.
It's easy to get discouraged in your job search and rejection is hard to take. Keep in mind that it is part of the process and to be expected. Just because one company didn't hire you doesn't mean the next one won't. There are plenty of ways to keep motivated and inspired. Listen to a tape by a motivational speaker, read a book containing positive quotes.