Miles or hours how do you plan your day's drive?

Depends on the trip.

If all we are going to be doing is watching TV until bed then we'll continue on and take plenty of breaks. I see no reason to stop and set up only to sit there and watch the idiot box when I could be driving.

We take our time, stop often and aren't in a rush. Now if there is a reason to stop and see the sights we'll stop for a few days and do just that.