I often find myself in the situation where I have 4000/4000 Justice Points. So any JP that I earn after this point either has to sit in a container in my bag (taking up valuable hoarding space) or get deleted - which is a shame.
Recently, I've been a little miffed by how much JP I simply delete so I decided to investigate how best to spend my JPs. Obviously the obvious thing to do was buy heirlooms - but for someone that tries not to use them it's a bit of a waste still.
Then it hit me - convert Justice Points to Honor Points... and buy mounts!
500 JP = 250 HP so you do effectively half it (assuming the two currencies are equal). Each mount is 2000 HP so thats equivalent to 4000 JP - which if you've got a few characters maxed out is nothing.
The HP mounts are all very cool and you get Call in the Cavalry. So far I have the Black Battlestrider and the Black War Ram (I forgot to take pics of them).
I'm posting this thinking that surely I'm not the only person wasting their JP and who hasn't thought about this nifty juggle to get some awesome mounts. Happy juggling!