Should you get your masters before going to law school or go to law school before you get your masters?

Certainly there is nothing wrong with that (especially if you have a specific reason for doing so). Just be careful you do not start moving horizontally, when you should be moving vertically. In other Words, some individuals acquire a particular vision of the future they intend to create for themselves. Then they develop a road-map that will lead them to the reality of that vision. They start moving in a vertical direction leading to that objective, and then all of a sudden something distracts them. Maybe it's something that looks like a good short-term win. Now that short-term win leads them in a horizontal direction away from the acquired vision they originally possessed. I would be very careful to ensure whatever is leading you to do a particular masters, is not going to distract you from your primary goal or objective. Sometimes the short-term win steals the long-term dream.