First off, this may or may not be a repost, but I found this out whilst dicking around in the orc starting zone on my undead warlock.
Go to the orc quest giver, he'll give you a quest to go kill 7 imps or whatever.
In return, you get you're "Summon Imp" spell, but you get 8 gold from this and a 75 silver for the after quest.
Im not sure if the hunter pet questline works like this too. But im sure at 69 you'll get ALOT of xp for quests that are level 10 do-able.