Lizandra Vega

For a job hunter, the first impression begins with a cover letter and résumé. Errors in grammar and spelling show a lack of attention to details and poor written communication skills.

After you pass the first test, author Lizandra Vega helps you prepare for your interview. "Business casual" won't cut it. "The interview suit is required in order to present the most professional image," she writes, whether you're applying for a blue-collar or white-collar job.

Forget plaids and light colors. Go "shopping in your closet," but if you have to buy new clothes, Vega offers advice on "buying that suits your build" – and your wallet.

Keep jewelry to a minimum. Lots of bling distracts, and women should avoid "bangles that jangle."

Eyeglasses can present a problem, too – "transition" lenses can look like sunglasses. If you have body piercings, Vega cautions against wearing studs and rings that draw attention to them.

For men, a necktie completes your interview look. Forget the fun ties – unless you're interviewing at Disney, a tie with Mickey Mouse on it won't impress the interviewer.