Hopefully most of you are familiar with the repeatable quest Concerted Efforts. If not, pretty much you turn in BG marks for honor. Pre-3.1, the requirements were a SoTA mark, an AB mark, a WSG mark and an EoTS mark, and the quest reward was 930 honor. Post-3.1, it also requires an AV mark, but gives now gives 1.3k honor. I've been turning this quest in all day, and it hasn't used any of my 51 AV marks, so it's pretty much 400 extra honor.
EDIT: I was doing this in IF, that might make a difference.