Rest System
The Rest System in World of Warcraft gives you an experience bonus for a several amount of experience points. If you rest in a city or an inn you will get an experience rate of 200% for killing a monster and for several experience points. That means if you are rested and your experience bar is blue colored you will get for every killed monster 200 % experience. This holds on until your experience bar is colored purple again. So when you want to logout go to an inn or a city in World of Warcraft to earn extra experience next time.
