First, decide which Looker profile you'll be working on - Developer or Business Analyst.
Make a resume that is specific to the job requirements.
Research about the company for which you will be interviewed.
Discover everything Looker has to offer.
Plan accordingly if the interview will be performed over the phone, via webcam, or in person.
Make sure you're prepared for the most common-asked Looker interview questions.
Make a list of questions that you want to ask the interviewer.