We mainly kept with our normal routine. We would go out to eat a bit more, but DH seemed to be preoccupied (obviously) making sure he had everything prepared and ready to go.
In the past, DH parents have visited sometime in the month or so before deployment. Other than that, we just try to spend as much time together as possible (going to the movies, spending time with friends, and just talking to each other). We also finish up any home projects before he leaves. DH will deploy right after the birth of our first child, so I have no idea of what to expect this time.