I'd say level this toon a bit more, maybe up to 30 or so, and see how you like the experience. If you find questing just a means to an end, maybe the guide would be a good buy. Me, I generally like questing and go to an area I'm interested in, even if it's not the most level-appropriate for me or the best way to maximize my time, so those guides aren't of much interest to me for now.
The Horde will now control most of Kalimdor, and the Alliance most of the Eastern Kingdoms. For a low-level character the quests and storylines won't change, but for high-level players many zones will see changes via phasing. Teldrassil is burned and Undercity is in ruins as the story progresses by phasing. At max level Arathi Highlands and Darkshore are phased to be updated to reflect their status as locations for Warfronts.

This spot actually kicks BOOTAY.  And I only say that because it's so hidden, unique and quirky that I had to add it to this list, despite it being a method rather than a farm.  Generally what you want to do is some sneaky arbitrage.  We'll be buying the items Royal olive, Dalapeno Pepper, River onion, and Muskenbutter from the vendor for 2g – and reselling them to the AH for 4g+. This is an awesome way to take advantage of players laziness and the demanding reagent requirements for some of the higher end recipes.  By selling from the vendor to AH, you can make easy gold – in fact I suspect most cooks do not know these reagents can be purchased from NPC's.
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It comes with a detection system for quest which monitors your previous actions and makes improvements based on them. A directional arrow that appears on the screen will indicate the best direction. It is fully automated hence saves you the trouble of having to click when moving to the next level. By following the guide you will require fewer than 7 game days to move from 1 to 80. You can begin from mid-level and let the guide lead you through the next levels.
Dugi’s leveling guide is the leveling addon I’ve always used to level as fast as possible. It will show you where to go and what to do in-game, speeding up the leveling process. This is optional though, as the game already does a pretty good job at showing you where to go at all times. The addon does, however, come with a couple of other nice features and perks.
When you have completed your third zone, you should be nearly max level, but you still have work to do! Head back to your faction hub and complete the last foothold quest to unlock your fourth mission table champion. After, you will want to do your newly available invasion missions for your faction. This quest chain is one that will be time gated by reputation levels earned with the 7th Legion for the Alliance and iThe Honorbound for the Horde. Complete as many quests as you can and then finish up your leveling with side quests you may have left in previous zones as necessary.
In World of Warcraft, establishing a monopoly proves much easier than the real world because of less competition and increased laziness from the consumer base, which increases demand through the roof. These factors are easy to exploit with proper preparation. Downloading and installing the following addons from your most trusted website is the first and most important step in the gold making process.

Hands. Down. The. Best. Whelping. Spot. Ever.  There are soo many spawns, and too many whelpings.  This spot is very close to becoming an infinite farm.  You just cant run out of targets to hit in such a confined area.  Each whelping has an 0.09 chance to drop a dark whelping – which may seem small until you realize you can easily down 40 whelps in a minute.  And by the time you finish, they will respawn.  The farm takes place at the ruins of Kargath in badlands and is usually empty.  Noone seems to visit this spot, probably because its more hit-or-miss than direct gold.  If luck finds you, you can walk away with a popular pet that's worth a pretty 14,000g
This level range opens a variety of zones from the Cataclysm expansion, which are spread across the game’s original continents, but it’s more efficient to head to the continent of Pandaria. You can spend the entirety of this level range exploring its uniquely themed zones and quests. The Jade Forest, Valley of the Four Winds, and Kun-Lai Summit are our picks, but all the zones are worth checking out.
Starting off at some mid level? Come into the guide from any level, scroll through, find and click the level you want to start with, and the guide will take it from there. Zygor suggests starting the guide a level or two before your level. This is to allow you to work you way into the local quest chains. Just skip the chains for quests you didn’t pick up along the way, or the quests that you already did.
Heirlooms: Heirlooms are the best source of bonus XP for leveling. All slots can be gotten pretty easily now, except the rings. The time you need to spend to get the rings if you haven’t gotten a level 3 shipyard in WoW is way too long, so getting the rings is generally not worth it. Having all your heirloom gear will boost XP by 55%. Generally, you want heirloom gear with crit on for leveling as you want to kill mobs in a few hits as possible
Sometimes you can make money by crafting items with ingredients supplied by other players who give you a tip to make the item. This is not necessarily a reliable source at low levels, but it can be a good supplemental income source at higher levels, particularly if you have good recipes. And if you can charge for the customer using your materials (as opposed to materials supplied by him/her), you can mark those up.
If you are dead set on leveling a production trade skill instead of taking two of the gathering skills, remember that not everything your trainer offers is worth buying. While it might be nice to have a long list of colorful shirts and dresses to produce as a tailor, for instance, the truth is they offer very little in the way of potential revenue. Also keep in mind that, generally, whatever items you craft at lower levels will not likely sell for more money than you could have made by simply selling the raw materials used to make them. For this reason, two gathering skills are highly recommended until you get closer to 80 (70 if you don't have the WotLK expansion or 60 if you don't have the TBC expansion).

These are Warlock- and Mage-only skills which can net you some money. It's not much, but a few gold is worth it. Note that Mages have an easier time with this than Warlocks as Warlocks need to be at the location for the summoning and need an additional person (a 3rd) for the group to help out with the summons. Mages only need the reagent to open the portal. While the Warlock doesn't incur a cost (except the loss of a soul shard), the Mage will typically be more successful at finding employment using this method.
Congratulations on reaching Level 120! There are a myriad of new things to do. The first thing you should do is head to your faction hub ship where you have been doing your mission table quests and footholds to pick up and complete the quests necessary to unlock World Quests. World Quests will provide you an opportunity to grind reputation levels, acquire gear, and gather Azerite. There are tons of new things to do that we will cover in our Level 120 Battle Guide found here: Level 120 Battle Guide.
Time Trials for MDI take place during a 72-hour window on the Tournament Realm. The first Time Trial window begins Saturday, March 23 at 7 a.m. PDT for MDI West (North America, Latin America, and Europe), and Saturday, March 30 at 7 a.m. CST for MDI East (China, South Korea, Southeast Asia, Taiwan and Australia/New Zealand). When this time window begins, players on the tournament realm will receive a quest with three Blizzard account-bound keystones from this Turnip, found in Hook Point (Alliance) or Mugambala (Horde).
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