Job candidates should prepare for an interview like it's a final exam, business-etiquette correspondent Peter Post writes in this column. Be prepared to answer an interviewer's questions and have questions in mind to ask, he advises. Also, don't be late, master a good handshake and eye contact for the initial greeting, and follow up with a thank-you note. "If you meet with three people, send a note to each person. If you do and your competitor doesn't, you will stand out," Post concludes.