It's time to do this again! I am bringing this back for nostalgic value along with a way for you guys to support me! Now keep in mind I am sending the very first original version of my leveling guide for Horde (I did not make an Alliance guide back then). This is not really meant to be used to level through WoW, even though you could use it for that purpose. My website JoanasWorld.com contains the latest up-to-date version of my leveling guides which have changed a lot over the years.
To get Blacksmithing to level 300 is much effort. It is not that thing to make fast gold. There is always a lack of Blacksmiths though. Enchanters need rods of all kinds, melee classes look for Sharpening Stones and Weightstones with Counterweights, others buy Iron Spurs. Once you have learnt rare and epic recipes, people will always use your service to craft items.
The quickest way to level up is to travel through the game's zones, completing all the quests you encounter along the way. Completing quests grants you Experience points, which will slowly fill in your experience bar with blue or purple. When the bar fills, you reach the next level. Alternatively, you could choose to run Dungeons or Battlegrounds, which are not covered in this beginner's guide.