One of the most useful ways to kick ass in a job interview (and in a job too) is to have a plan. Most people, when interviewing, don't even think about having a plan. This might make some sense - you don't know what you re really getting yourself into and you don't know what the job will entail until you arrive. But that aside, having a basic plan can bump you to the front of the line compared to your colleagues.
When we talk about a plan, for me, its all about the 30 / 60 / 90. This is a high level list of tasks you want to accomplish during the first 90 days of your career at your new employer. Having a plan helps you through the first 90 days, gets you shipping, and makes you more engaged in the workplace.
Setting up a 30/60/90 isn't a 2 minute exercise. But it doesn't have to be complicated. You need to think about what you want to accomplish over the next year, how you want to contribute based on the job description.