This is something really simple, but I have noticed that almost no one does this. A few people had posted that you can still get extra honor for staying in a BG after it closes. This is true, and I found a interesting way of guaranteing it.
1. You need a pet
2. You need to have one of the opposing factions NPC's targeted before the BG ends.
All you have to do is send your pet to attack the NPC, after the BG ends. For some reason pets can still damage them, and the NPCS will still die. You may only have 2 minutes to kill the NPC,s but with a good pet it shouldn't be a problem.
If the NPC was a commander, and he dies, you STILL GET THE HONOR!
Hope this helps those who didn't know about it get extra honor.