It is ridiculously hard to get hired because of the influx of other people trying to get a job there.
It doesn't take very long to get hired. Send a resume and wait for the call.
Have a love of video games and a good personality to sell them. Dont assume its an easy job and be willing to push the product.
Knowledge of games and customer satisfaction, aswell as an egar work ethic
Be knowledgeable in the electronics/video game field and keep up to date with recent changed in the market. Be comfortable talking to people because you'll be doing a lot of it, sometimes to children so be comfortable around kids too.