1) Finish 5.1 faction questline/rep
2) Finish 5.1/5.0 Black Prince quests (I wish the valor one showed your progression...)
3) Finish with your farm/Tillers, so you can take ownership
4) Prioritize gear upgrading.. There's not a lot of point in grinding valor to upgrade an item that might easily be replaced with a rep reward or LFR drop early in 5.2. Upgrading raid drops isn't bad, but you might not want to bother with upgrading 476 gear since it will be replaced.
5) Clear a stable slot or two...
Remember that there with be a valor and conquest reset, so don't get caught with valor and conquest that get downgraded. Get that last item, and then take a break..
