Do greet the receptionist and other “low-level” staff with respect and courtesy.  Oftentimes interviewers will ask a receptionist or a secretary about their experience with a job candidate, make sure you make a good impression.

Don’t smoke during or before an interview even if the interviewer asks you if you want a smoke. Smoking before an interview can leave you with a clothes that smell like smoke, leaving a bad impression at your interview.

Do make sure that you properly pronounce the interviewer’s name.  If the interviewer has an unusual name or name that is difficult to pronounce make sure that you find out the correct pronunciation before you arrive at the interview.

Don’t answer your cell phone or even check a text message during your interview.  It has become so commonplace to have constant interruptions such as phone calls, text messages etc. that we automatically check them during dinner, conversations and even during interviews. 

Do avoid using slang and conversation fillers such as “like,” “um,” and “uh” during your interview.