4. Take convenient quests. If a quest requires you to visit a small island in the middle of an ocean on the other side of the continent, it’s probably not worth doing, if you’re trying to be efficient about leveling. 

5. To be courteous to other players. You can just leave the monster alone, rather than be rude and kill them that other players need for a quest but which you don’t. There may be an elite quest which bears better equipment that you will need to team up with that player with later. The same goes for killing enemy faction players, they can make your experience a lot tougher if you don’t leave them alone. In addition, they probably have a main logged in near their alternate character, ready to pounce.

At times, reaching level 80 is a very long road. Because out there, there are many obstacles and it takes many hard hours of work but if you just follow these as above-mentioned tips, your character will be level 80 in short period of time.

 Source: http://www.wowgold365.co.uk