(4) Discussing your family situation: As a mom, your family comes first. You could be the CEO of a top five company, but your kids are still the most important things in the world to you. On your interview, however, you have no kids. The interviewer may discuss her grandchildren until the cows come home, but resist the urge to show the latest snapshots of your pride and joy. It is illegal for a potential employer to ask about your family situation because it may (and does) lead to discrimination. So you do not need to open that door. And never ever discuss your nasty divorce or custody battle.
(5) Lying about unexplained gaps in employment: I have taken a year off of work and am ready to go back to work now. When people interviewing me ask about this time gap, I have the perfect excuse as I had recently relocated to a new city. If I had not, however, I would be very general about it. I might say something like, "family issues." But I would never invent something that was untrue. People have a way of finding things out, and you never want to be caught in a lie.
So there you have it. In a nutshell, the best things to avoid on an interview. And don't say I didn't warn you!