Many people, however, prefer to level up using the Looking For Group finder (LFG), and run dungeons. This really only is faster than questing if you're a tank, which requires foreknowledge of most dungeons to perform adequately; or if you have never leveled a character in WoW at all.
- Leveling through questing
Most quests are very easy to complete, and if you're good at planning a route around a small area within a zone, they can be completed very efficiently. This is best accomplished by using the Quest Log and the game's Map in order to see what objectives are where for the quests you intend to complete, and how you can make a quick path. Often, objectives overlap within an area, so by killing the targets within the area the Map shows the items can be found you'll get the drops you need to complete each objective, or clear out enough area to pick up items that may be laying on the ground safely.
A little bit of experience in this is very valuable to develop a flow of your questing style, and become very efficient in gaining experience through questing. You may also benefit greatly by continually improving your gear through quest rewards, at least in the lower levels.
Dungeons (LFG) you may also level fairly rapidly by using the LFG tool in order to complete dungeons, which reward a substantial amount of XP upon killing the final bosses of each. This is best for those who are willing to tank in these dungeons, since queue times are practically nonexistent for tanks in the LFG environment. Most times I've queued up as a tank in LFG, I've had to wait a second or three before getting the notification that my group is ready. If you are playing as a damaging role in a dungeon, you may have to wait for up to 30 minutes (usually at higher levels) in order to be grouped into an actual dungeon.
However, if you're a newer player, especially one who has never been in these dungeons, you're probably not going to be able to tank very well. It requires, at a bare minimum, knowing where to go in the dungeons, since the tank is invariably expected to be experienced and to lead the group to each objective. I'd also like to point out here that if you're too new to the MMO genre to know what a tank is, you definitely should not be tanking. This is a role that requires you to know what you're doing in order for the members of your group to survive in dungeons long enough to finish and complete quests or objectives within the dungeons.
Healing in dungeons is also a role that at least requires you to know how to heal a fair bit. It's not quite as big of a responsibility as tanking, but certainly not something most people can jump into without at least a little practice and familiarity with healing spells and their usage. An added benefit for healers in LFG is that your queue times are usually much lower than for a damage role, but usually longer than that of a tank.
- Use another higher level character
These two options above are all the good ways to level up quickly. Hope it can help you.