Well during Hollow's End there are candy buckets placed all around the globe. Every time you grab candy from the bucket it gives you candy AND experience. My brother (at level 73) went around the globe grabbing candy buckets got around 10k exp for each bucket. This was a fairly decent amount of experience probably half the exp he gets from completing quests in Notherend. I don't know if this could possibly get someone a level but I thought it was a nice find. Tell me your thoughts, thanks.