get levels up. there is a calculator tht shows how manytimes you have to level up any of your combat skills to lvl up your combat
[edit]oh, World of Warcraft, sorry
The easiest way to level up is to feed Pokemon Rare candies.
completing puzzles are the best way to level up.
There is no best way, just change monsters as you level up. edit: this guy is a dick thanks mister know it all
Train it.
By playing.. ;)
look at achievements and just get alot of kills it takes a while but it works
For me the best way i have found to level is by doing all the quest in each area before you move on to the next area.
Slayer is the easiest and best way. You train a multitude of combat skills as well as your Slayer level.
The best way to level up pidgeotto is to have the move quick attack and take him into diglett cave, just run around and use quick attack.
Well...There really is no way to level up "faster", but adding friends helps you, and doing the quests! Hope it helped! :)
rare candy
hardcore capture the flag