Though its specifically on making it in Japan, the advice given applies to the games industry in the US too.
Here's some bits of universal advice that stood out to me:
"Like to draw? Bring a sketchbook portfolio or 3D render. Developers always want good artists. Want to be a designer? Show them some sample concepts and game ideas, or do a "what-if" scenario with their intellectual property: "This is my version of a Lost Planet RTS." Have a management background? Discuss some thoughts you had about effectively managing schedules or budgets."
"Even if some of your offerings are a little off-base, you will have shown that you can grow inside the team to fill a necessary role, not just be the go-to guy for English e-mail exchanges or developer blogs. And, if you can prove that you have knowledge, drive, language ability, and growth potential, then you will be an impressive candidate in this world of global markets and overseas outsourcing.