Dugi’s leveling guides cover everything from level 1 to 120, for both Horde and Alliance, and any race and class you can think of. You get an addon that you load inside the game which shows you step-by-step how to get to the maximum level in a streamlined fashion. There’s even a waypoint arrow that shows you the direction you need to go, so you’re always on the right track. The addon instructs you which quests to pick up, where and how to do them, when to turn them in, and even other features as well. Dugi guides have been around since 2005, so they’re probably going to be around in the future as well, keeping everything up to date and current.
The older brother of this potion originally came about in Cataclysm as the Potion of Treasure Finding, and is actually one of the best ways to make money. Since most Pandaria mats are constantly farmed, they usually sell for less than the Cataclysm mats. This makes using this form of the potion more effective for making gold. Not to mention that creatures die faster to level 90s since they were made for the previous expansion, making farming the treasure chests that drop rather easy.
Something to keep in mind as well is that this will make enchanting materials more valuable, since it is likely most players will now simply scrap their boe greens instead of getting them disenchanted. Also redundant dungeon/raid gear can be scrapped rather than traded to the (guild) enchanter in the run. Less stuff gets disenchanted, meaning there will be less ecnhanting materials, meaning their value will rise. All the more reason to DE rather than scrap as an ecnhanter.