Well, first off you need to be ranged or stealth. I don't think warriors would work for this.
Anyways as everyone knows, there are always afkers in the AV.
So, all you have to do is go to a graveyard where the majority of the horde are spawning.
If you are ranged you would go up behind it (if possible).
If you are stealth then you can just camp right amoungst the respawners.
After you settle yourself, just wait for the horde to respawn. There are usually 1-3 horde or alliance afk. Just kill them, take their insignia, and wait for them to respawn.
Simple as that.
In one AV I (alliance rogue) just camped SH graveyard after the horde capped it and there were two hordies just afk there so I killed them, took their insignia so they would respawn, and killed them again.
Just be careful, if you don't kill them fast enough, the the others will respawn and most likely kill you. If they do kill you then you can just run back.
In the AV if you go on offense you most likely will face Defense, but the HK honor from that is only like 1-6 for each kill.
When you kill the afkers you get 21 honor for a level 70. And now with the DR on honor gone with 2.4 you get 21 each kill.
Lets say you kill one horde every 30 seconds he respawns, 20 times, for a 10 minute AV.
20kills x 21honor per kill = 410 honor
Thats alot of extra honor! =D Enjoy