Research. This is an obvious first step that some people may completely overlook. Don't.

Here's the time to put those internet stalking skills to good use. Know everything there is to know about the company you're going to be working for. Don't stop at the company website. Look at their social media accounts, articles written about them, customer reviews, maybe even blogs and social media posts from past and present employees. Take notes and see how you can put the information to good use.