Never talk down on yourself or anyone else. Be confidant in yourself and experiences and always speak highly of previous employers.
Be prepared to speak about your resume and the experiences you have had. More often than not interview questions will encompass behavioral and situational questions. Spend some time looking up these types of questions so you will have potential answers ready if these types of questions are asked. Lastly, come to the interview prepared with questions to ask about the company based on research you have done along with questions specific to the position you applied for. This will show the recruiter/hiring manager your interest in the company and the position.
It crosses all industries and is a skill everyone should cultivate. Your elevator pitch is 3 things: 30 seconds. What's your skill? What's your ask?
STAR allows you to fully respond to questions in this format. STAR stands for Situation, Task, Action and Response. If you position your responses in a star format it allows you to be short and concise with your answers. It also provides insight to the interviewer on your response to situation in the workplace or in school.
My recommendations are to first off ensure that your resume is in top form. You can search online for sample resumes to use that are relevant to your area of experience. Then make sure your cover letter reinforces the fact that you have some great experience that you can bring to your next organization. Also include your desire for new learning and challenges, so that the hiring manager/recruiter can see that you aren't looking to stay stagnant.
The job interview is the one setting in which it is professionally understood that you will be talking well of yourself.
It's best to be honest during the interview when you do not know the answer to a question rather than try to fudge your way through it - the interviewers will notice and that will be worse than admitting you don't know.
Answer all the questions honestly. If you don't know, you don't know.
The last thing you want to do in this situation is ramble. I would first ask some clarifying questions to ensure you understand the question.
[M]any employers utilize cognitive, competency, and personality testing nowadays.