When I used to do interviews, I always asked what it was about our company that made them want to work here. It's surprising, but some didn't know what we did.

Also, if the field you're getting into has many facets (like data processing/information technology) have some idea of what it is you actually want to do. Inventory applications or accounting. Robotics or technical support. Good to think about before you're asked.

GOOD LUCK!