Questing And Grinding
WoW’s character progression is quest based. Levelling your character through quests lets you see more of the world, and yields rewards.
You can choose to ignore quests and simply kill enemies in an area until they stop giving good exp, and move onto the next area. This is known as grinding. Compared to questing, grinding can be better exp and level you up faster. The downside is that it’s boring. If you are willing to endure that, then you will reach level 60 faster. I recommend going the quest route, as levelling from 1-60 can be a lot of fun. In my experience, questing is definately quicker than grinding from 60-70.
As you level, you will get offered more quests. Since your quest log has a limit of 25, you cannot accept every quest everywhere. At times it is best to forego doing some quests in an area because you out-levelled them while you were doing other quests. Such is life. You could go back and do the now-grey quests, but this really is a waste of time and slows you down. The rewards won’t be worth

much anymore, and the enemies you kill won’t give exp. One reason to do grey quests is when they are part of a chain, and you want to do one of the later quests of that chain. Otherwise, I wouldnt bother with them.
Some quests send you to far off zones, sometimes places you are not ready to go to yet, or werent planning to go to at all. If you have room in your quest log, I recommend you pick them up and carry on what you were doing. You just might find yourself going to that zone later on anwyay, and you'll be happy you did get the quest if you do. Avoid traveling to another zone specifically for any one quest, it will generally cost you more time than its worth.
An important thing is that some quests have a common objective. You might have one quest that has you collect 10 skeleton skulls, and another quest that has you kill 20 skeletons. Because of this, when you move to a new zone, it is a good idea to pick up every quest you can get before starting to kill there. If you don’t, you might end up killing kobold miners for quest A, and find out quest B requires you to kill the same kobold miners later on. Arg.
Where to do quests? If you complete all quests in an area, you will be directed to a new area through another quest. It is always best to complete all quests you want to do in the area you were in, so you don’t have to travel back and forth all the time. Don’t go do an errand in another zone if you havent finished the quests in your current area. Get everything done, then pack your things and move to a new town.
Remember that you aren’t forced to do every quest. While some may want to do every single quest, its really not needed. Some quests require a large effort for a small reward, and are not worth it. Get rid of them, forget them, and do some easier quests instead.