Shadmabe9

On whichever phone number you're giving out on applications and your resume, don't forget to have an answering machine.

If a potential employer calls and you're out at an interview, you'll need to know who they were and how to reach them.

Update your resume. You should always keep your resume current, even when you are not on the hunt for a job.
You never know when an opportunity may present itself, so have a copy of your resume ready and available.