S.B.
For one thing, make sure that you have your kids out of the house for the interview. Have a friend or neighbor...someone...take them about 2 hours prior so that you can have your thoughts in order.
You do NOT want to sound distracted, no TV or noise of any kind in the background. If you have a cat that gets on your lap when you're on the phone, toss it in the garage.
I suggest one night after the kids have gone to bed, you find a quiet place to yourself, even in the bathtub, and start going over the things you did at your previous jobs. Write them down.
Start with the job requirements for the new position.
How can you meet each of the requirements and be an asset?
Many interviewers ask "What was the best thing about your last job? What was your least favorite thing?"
"Have you ever had to deal with someone you didn't get along with at work? If so, how did you handle it?"
Two of my most hated questions are:
"What would you say is your biggest character flaw?" and
"Where do you see yourself in 5 years?"
Seriously?
The first question I answer with the fact that I am not good at separating work from home. I'm not one of those people who can just clock out and erase the day and not think about it again until I clock in in the morning. I'm always thinking of ways I can improve something or something I need to follow up on the next day. I've never been one that can easily turn my "work brain" off. I never stop thinking about what needs to be done.
It's the truth.
Where do I see myself in 5 years?
Happily employed and committed to a position that I can take pride in with an employer who values me equally.
I hate to say it, but some of the interview process is B.S. Meaning you need to be skilled in it.
Don't be deceptive, I don't mean that. If you're not geared up to give at least 100%, why even interview? But, you do have to sell yourself and your strengths. You have to give them a reason to choose YOU.
Like I said, take some quiet time. Write down what you did at your other jobs.
It's only been 3 years, you're too young for dementia. You can't say you don't remember.
Did you answer phones? Did you take messages? Did you edit monthly newsletters? Did you use the database? Did you schedule appointments? Did you process the mail or maintain correspondence? Did you order supplies every month or process the daily mail? Were you involved with HR or dispute resolution?
Take some quiet time and really think about your experiences.
Focus on your strengths.
Make sure you have no distractions before or during the interview.
Best wishes.