Bike Radar suggested grease or anti seize on the hub before installing cassette.

http://www.bikeradar.com/us/gear/article/how-to-replace-a-bike-cassette-video-18234/

I think there was another one that put a white grease all over the hub as well and then I found others, like those above that put nothing on it.

Thanks guys.

I was concerned there were other things I should do but it looks like a piece of cake.

thanks