Invest - If you do not plan to rush to level 60 and want to take your time instead, this tip might come in very handy for you. The value of many Items will increase over time because more and more Gold will find its way to the market. To take advantage of this, you can stack up on various crafting materials with the intention of selling them on a later date. This will require a lot of patience and some Grinding if you want to make a good profit but is certainly worth your while if you are an economy-oriented Player.
Kurzen's Compound (marked BLUE on the map) - Colonel Kurzen was once a very talented Stormwind Officer. He was sent with an expedition to the Jungles of Stranglethorn, where he fell victim to Mai'Zoth, a powerful Ogre Mage and his foul magic. Majority of Colonel's troops are still loyal to him and provide Players with some valuable Loot. In this spot, you will encounter Kurzen Jungle Fighters, Kurzen Medicine Men, Kurzen Wranglers, and Kurzen Commandos. These Humanoids drop a lot of Silk Cloth (that can be generally turned into Bandages and Vendored), valuable Wool Cloth (the main source of Gold from this spot, check the AH prices), Fadeleaf (Medicine Men), Liferoot (Medicine Men), 12 Slot Bags (Commandos), Vendor Trash Items, and some Pocket Money. This spot is especially good for Rogues, as the ability to Pickpocket mobs will increase profits by a noticeable margin. Recommended Level - 34+ (36+ to be extra safe, as Humanoid mobs can be problematic because they tend to run away on low health and pull additional enemies).