Lots of things in the world of Azeroth are very useful, but a pain to remember to use/drop. One of these things is the +XP Guild Banner. My solution is to use them as a passive buff while leveling. All three of the banners share a 2 minute cooldown, but individually they have a 10 minute cooldown. So incorporating them in a macro can ensure you get passive +XP (5%,10%,15%) buffs while you quest/dungeon. Here’s the macro format:
/use [combat,nogroup:raid]Battle Standard of Coordination
/use [combat,nogroup:raid]Standard of Unity
/use [combat,nogroup:raid]Banner of Cooperation
Just replace <spell> with an ability you normally would use like Judgment, Plague Strike, Mangle, Blackout Kick, or Shield Slam to gain passive +XP buffs while you level. Go see your guild vendor to acquire them. I’m rocking for 6 minutes out of every 10 either a +5%, +10%, or +15% xp buff. You should too.