At this point I am going to combine the leveling paths simply because there are not Horde/Alliance lines anymore. If you are on a PvP server, this means a slow down of leveling. You will have to fight some players, while other players will leave you alone if you leave them alone.
If you run across someone of higher level and they decide to kill you, and then wait near your body for you to reappear, and then kill you over and over, this is known as “camping”. On PvP servers this needs to continue for many hours before it is against any rules. Your best bet is to call in friends to help out. If no one is on who can help you, your best bet is to simply log out and do something else for an hour or two. If you have to play, I recommend an alternative character. Play that character for an hour or two, then switch back to your shaman.
If you are playing on a “normal” server make sure you keep your PvP flag off if you want to level. Having your PvP flag active on a normal server is asking for problems.
Level 41-45
You can continue to level in Badlands if you are already here. This zone is viable for experience until just after level 45. Your other option to look for leveling is Feralas. Feralas is located between Desolace and 1k Needles. This zone is great for herbalists to level up. Tanaris is another great zone to level in. It is south of 1k Needles. This zone is wide open and has an entrance to Zul'Farrak. A good dungeon to do while in this level range is Uldaman, located inside Badlands.

Level 46-50
You can go to Zul'Farrak at this point in your leveling career. Maraudon is another well traveled dungeon for this level range. Maraudon is located in Desolace. Zones to level are many at this level range. The Hinterlands is a great zone to level in, and if you are on a PvP server, this will bring back your days at Hillsbrad. Un'Goro Crater is another good zone to level in. Located between Tanaris and Silithus, this zone is pretty quiet most of the time, and has a very Jurassic Park feel to it. Felwood is the last zone I will mention for level. This zone is very busy with people going through it. There are other zones to level in, these are just the best in my experience.
Level 51-55
For miners of this level, Burning Steppes is the “have to” experience. Burning Steppes has some good quests going on. It has more Alliance quests than Horde, but has enough for both sides. Your other option for leveling effectively at this level range is Western Plaguelands. This land has a lot of Warcraft history in it. It has lots of quests that go along with it. Sunken Temple is the dungeon of choice at this level.
Level 56-60
The first zone that you should check out during this level range is Winterspring. This zone is great for herbalists, and has some good quests that turn out great rewards. Silithus is another good zone. Being out of the way, it is normaly pretty barren of other players. The big reason to be leveling in Silithus is to gain Cenarion Circle faction. The final zone of great interest is Eastern Plaguelands. Eastern Plaugelands is full of quests to do. Also, the four towers in the zone add more fun to the game. There are numerous dungeons at this level. The Savage Gladiator’s set can be found in Blackrock Depths.
Level 58-70

At level 58 you are able to access Outlands without having someone summon you, or a mage teleport you. You can go to Blasted Lands next to Swamp of Sorrows. In Blasted Lands you can enter through the Dark Portal, and enter into Hellfire Peninsula. Below level 60, you need to be careful leveling in Outlands because mobs are stronger than normal mobs of “old world”. The plus is that mobs in Outlands provide more experience per kill. The drops from mobs, and the

rewards from quests will quickly replace all your other equipment that you had. So, while it will be tough going at first, it is well worth it.
The first zone you are going to want to level in is Hellfire Peninsula. Hellfire Peninsula offers lots of quests and good experience. Something to note is that Fel Reaver walks around the zone. He is a level 70 elite that catches people unaware all the time. Keep an eye out for him when you are killing in Hellfire Peninsula.
Once you are about level 60, you can move into Zangarmarsh. Zangarmarsh is a great spot for herbalists. Zanagarmarsh has a lot of faction drops that can be sold to other players once you have your faction where you want it. This zone also has two towers that can be captured by either the Horde, or the Alliance, and the graveyard can be captured with a flag from your town. This causes all damage by your faction to go up 5% in the zone.
Around level 62 you can start leveling in Terokkar Forest. This is the zone with Shattrath City in it. Terokkar Forest also has a PvP tower system. If your faction captures all five towers, you will have an increase in both damage and experience. This zone has lots of quests available to it. In addition, there are quests that start in Shattrath City to help the leveling experience.
Nagrand will seem almost out of place when compared to the other zones of Outlands you have experience. I recommend you be level 64 before you start to level here. Halaa is a very interesting and fun PvP target for Nagrand. It is a town that switches factions on who it is friendly for. To capture Halaa for your faction, you have to capture one of the flying towers, and then make bombing runs on the guards in town. Once all the guards are dead, you need to occupy it until it switches over to your faction. This gives your faction the standard 5% damage buff in the zone.
Around level 65 you can head to Blade's Edge Mountains. This zone has plenty of quests for you to continue leveling with. This is a great zone for miners to gather outland ores. This zone is much easier to get around when you get your level 70 flying mount though.

You can kill mobs in Netherstorm starting around level 67. Netherstorm is very broken up into individual islands. This means without a flying mount, you will have to run to specific spots to cross. This can make the experience in this zone slow down. The main city of Area 52 is something you have to see.
The last zone in Outlands is Shadowmoon Valley. You are going to want to be level 67 or higher before you come here to level of the NPCs. This is where the Black Temple resides. At level 70 you will be able to purchase your flying mount. For the Horde, your trainer and seller are located in Shadowmoon Village. Alliance, your trainer and seller are located in Wildhammer Stronghold. This zone is where you can easily end your leveling career with lots of mobs to kill, and lots of experience in quests.