When dressing for a library job interview, male candidates should wear one, and no more than one, of the following items to increase their chances of landing the position:
Librarians should feel free to casually discuss menstrual cycles, menopause, and feminine hygiene/grooming around the library workspace. Don't worry about scandalizing your library's male librarian. He had his testicles removed as part of library school "orientation."
Librarians should embrace their inner drill sergeants and become "information warriors" in the library instruction classroom. Knit yourself a camouflaged cardigan, convert your classroom into a bibliographic boot camp, and put in a work order to have your bookmobile converted into a tank.
A librarian should never allow her-/himself to be videotaped while dancing and singing about libraries. Find the part of yourself that says, "This will be cute!" and remove it from your body with a dull letter opener.
A polite circulation librarian should always repeat the name of the patron's book aloud at the conclusion of a library check-out transaction. By loudly saying, "I hope you enjoy An Idiot's Guide to Do-It-Yourself Colonoscopies, Ms. Johnson," you will not only confirm your patron's book selection, but also send the patron away with a personal touch they won't likely forget.
Librarians should always prepare for job interviews by stalking their interviewers on Facebook, Twitter, and other social media tools. Nothing says, "I have mad research skills!" like sharing your intimate knowledge of a complete stranger's personal life.