''If someone shows up late for an interview with no excuse and no effort made to let me know they were running behind I tell them I am no longer interested in interviewing them. Same thing for being interviewed. I've withdrawn applications and left appointments after being kept waiting with no good reason or apology.'' One boss said.

Don't take out your phone during the interview.  Don't do it to check the time, don't do it to answer a call and definitely don't do it to check any social media. It should be on silent to avoid any distractions. This is just one way of appearing that you are uninterested but showing interest and enthusiasm is extremely important. Don't get a parent to ask about a job for you.  Okay, so this one is obviously for younger and perhaps first-time employees, but it does happen.

''Honey, if your son isn't going to bring his lazy ass down here and ask for a job? He doesn't want it and I don't want him.'' One employer said on Reddit.

Make sure your email address is a professional one.

One Reddit user spoke about his friend being underdressed for an interview but adds that ''the real red flag was his email address... DANKWAGON420. We were laughing so hard when we looked over the application and came across that. Needless to say he didn't get hired.''

First name last name at Gmail.com is usually a much safer option. Don't lie on your CV.  Whether it's an extra language or an unusual skill, that little white lie will come back to bite you.

"Don't say you have excellent communication skills and have spelling and grammar errors and then in the interview give brief non-responsive answers, or just go on and on." One employee said.

Of course, these are just five interesting bits of advice from employers and bosses, and there is plenty more advice out there. The main thing to remember is to be prepared, be polite and be punctual.