How can you level up quick in wow?
The easiest way if to Recruit a Friend (or RAF). This way you
will receive 3x experience therefore leveling up at a faster
rate.
---
If you do not have recruit-a-friend, then the best way is still
to quest, do dungeons, and grind it out. Also, if you happen to
already have a high level character, and enough badges/stonekeepers
shards, the investing in some BoA (Bind on Account) gear. If you
get the chest and shoulders, this will give you 20% extra XP from
killing mobs and completing quests. There is also a ring, for
another 5%, but that is from the Kalu'ak fishing derby and is
harder to get. Joining a guild can be helpful as well as generally
guild mates will make gear and weapons, enchant, glyphs and other
services for their guild members free or at a severely reduced
cost.