To give you some perspective I leveled both a LF Ret Paladin and BE Rogue (so one started from level 20 and the other from level 1). I focused on getting the achievements I was missing for the Loremaster, so not the most efficient route by any means. I was using full enchanted heirlooms (minus the ring) and the WoW-Pro addon though, as well as having War Mode turned on all the way.
I am currently working full time on my Vanilla WoW leveling guides.  Soon there will be a 1-60 speed leveling guide for Alliance, along with in-game guide versions available for my members area.  As of right now, there is no members area, but if you would like to show support for my efforts into this project, you can simply donate to me via Patreon if you like (you will get some cool rewards in return).  Or you can donate directly with PayPal if you like.  All donations are highly appreciated and they will only motivate me more to continue making the best vanilla WoW leveling guides on the web.
The value of World of Warcraft gold has plunged relative to the value of real money in the past two years, but a series of events in the game have kept that fact from impacting the economy for players who don’t spend money on gold. That could be changing, however, and you might see some shocking prices in the auction house over the next several months if you’re playing Battle for Azeroth.
I hope this information helps a lot for players that haven’t had the chance to play Beta and gives you an idea of what you should be trying to accomplish your first 2 weeks of BFA. If you plan on pulling all-nighters, please don’t be reckless and over strain yourself. People have died from lack of sleep. If you want some tips on staying up I recommend taking a nap before launch time, eating a healthy meal full of protein before launch, snacking on fruit and nuts (my personal go to is clementine oranges and almonds) while leveling, if you do decide to drink energy drinks I do recommend not getting the ones packed with sugar (I prefer no sugar no carb Redbull and G-Fuel) and making sure you drink at least 2 bottles of water in between every energy drink so you stay hydrated and don’t crash. A good time to get some sleep is after you finish all the questing and you are 120 which again will take average played 10+ hours. Again, please don’t be stupid and end up hurting yourself over a video game; everyone must sleep at some point, so you won’t be too behind the curve.
Usually it's best to avoid a lot of instance runs. It is too difficult to account for bad groups, and some instances are too far away with too few quests. Since the experience is very good, it's a good idea to clear nearby instances which have a lot of quests once (Gnomeregan, Deadmines for Alliance). Distant instances with few quests should be avoided (Deadmines for Horde). Low level instances can be cleared by paying or befriending a single high level character. However, since patch 3.3 a new Dungeon group finding system has been implemented, as well as a direct port to dungeons (when entering the group you get ported to the dungeon and back to the same location if you leave it) and thus the travel time to dungeons has been greatly reduced. This makes it a good idea to complete quests or grind while you wait for a group to become available.
If you prospect your own Ores, usually you will get a lot of [Lesser Moonstone] too, but even if you don't prospect the Ores, sometimes 2 Lesser Moonstone is cheaper than one Moss Agate. So get the recipe [Design: Amulet of the Moon] and use up all your Lesser Moonstone. This recipe turns yellow at 140, you might need to make more than 30 of these.

S Sanguino Alliance Sanguino Horde Sargeras Alliance Sargeras Horde Saurfang Alliance Saurfang Horde Scarshield Legion Alliance Scarshield Legion Horde Sen'jin Alliance Sen'jin Horde Shadowsong Alliance Shadowsong Horde Shattered Halls Alliance Shattered Halls Horde Shattered Hand Alliance Shattered Hand Horde Shattrath Alliance Shattrath Horde Shen'dralar Alliance Shen'dralar Horde Silvermoon Alliance Silvermoon Horde Sinstralis Alliance Sinstralis Horde Skullcrusher Alliance Skullcrusher Horde Spinebreaker Alliance Spinebreaker Horde Sporeggar Alliance Sporeggar Horde Steamwheedle Cartel Alliance Steamwheedle Cartel Horde Stormrage Alliance Stormrage Horde Stormreaver Alliance Stormreaver Horde Stormscale Alliance Stormscale Horde Sunstrider Alliance Sunstrider Horde Suramar Alliance Suramar Horde Sylvanas Alliance Sylvanas Horde

For Alliance it's Lok'Modan, Redridge, Darkshore, Felwood, Stranglethorn (both parts), Plaguelands. Somewhere between 3 - 3.5 of these get you to 60 in like a 16 hours /played, if you queue for dungeons at the same time. I recommend dropping everything at 45 and going to Darkshore-Felwood if you didn't do them yet - they are literally the fastest levelling zones in the game right now, maybe only trumped by Silverpine.
Madoran-Alliance-USMadoran-Horde-USMaelstrom-Alliance-USMaelstrom-Horde-USMagtheridon-Alliance-USMagtheridon-Horde-USMaiev-Alliance-USMaiev-Horde-USMal'Ganis-Alliance-USMal'Ganis-Horde-USMalfurion-Alliance-USMalfurion-Horde-USMalorne-Alliance-USMalorne-Horde-USMalygos-Alliance-USMalygos-Horde-USMannoroth-Alliance-USMannoroth-Horde-USMedivh-Alliance-USMedivh-Horde-USMisha-Alliance-USMisha-Horde-USMok'Nathal-Alliance-USMok'Nathal-Horde-USMoon Guard-Alliance-USMoon Guard-Horde-USMoonrunner-Alliance-USMoonrunner-Horde-USMug'thol-Alliance-USMug'thol-Horde-USMuradin-Alliance-USMuradin-Horde-US
C C'Thun Alliance C'Thun Horde Chamber of Aspects Alliance Chamber of Aspects Horde Chants éternels Alliance Chants éternels Horde Cho'gall Alliance Cho'gall Horde Chromaggus Alliance Chromaggus Horde Colinas Pardas Alliance Colinas Pardas Horde Confrérie du Thorium Alliance Confrérie du Thorium Horde Conseil des Ombres Alliance Conseil des Ombres Horde Crushridge Alliance Crushridge Horde Culte de la Rive noire Alliance Culte de la Rive noire Horde
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