How do you level fast on World of Warcraft

Doing dungeons and many quests is one way to level fast, often helped by the Experience boost from Heirloom items (if you already have a level 80 character).

If you are leveling with a friend, the Recruit a Friend option (RAF) allows you to level much quicker while together, and grant each other levels periodically.

The best advice is also to always log out at an Inn. This way you get a higher Rested percentage, and monsters slain while you are rested grant more XP.