One of the very cool things about Zygor’s Guide is that it’s automated. Not only do you not have to manually switch from game to guide, you won’t even have to click to the next quest. Complete a quest and the guide will automatically update to the next quest. The guide does it for you (usually, sometimes you’ll have to click to the next quest on your own.) It really is like having someone giving advice over your shoulder. Here’s the next quest, here’s what you need to get…
The Horde 12-20 (Barrens + Stonetalon Mountains) guide has been rewritten and revamped.  In addition, there has been numerous tweaks to the speedrun route to make things faster and easier to follow.  Also, in case you haven't noticed I am now adding about 40% more info per step and redoing all the images.  Unlike with my previous vanilla guides, I am now giving a brief explanation of where to go and what to do with each step along with any other helpful tips.

The leveling path was built around using a Hunter character and run by a player who knew how to use that character well. For the average player running, for example, a Paladin, the guides could be frustrating in spots, due to the level of the mobs. I played through Joana’s Guide with a Rogue (all the way from 1-70) and was able to deal with most everything, except for a few elites and I skipped most all of the group quests.

Battle for Azeroth’s War Mode puts you into PvP mode and grants you 10 percent extra experience. But since the two factions will mostly level in separate zones entirely, you should almost definitely have this on when you’re leveling. That said, if you start getting killed by random PvP players consistently, stop using it. Although 10 percent is nice, it’s not worth dying every few minutes for.
A dungeon should take about half an hour to 45 minutes, that is reasonable. What did we do to Maw of Souls because it was by far the fastest dungeon to spam run for AP? Nerfed its yield. Same happened to dungeons. Except instead of nerfing the XP, they adjusted the clear speed to justify the experience a bit more. Is it perfect? Nah, a lot of dungeons aren't even that long with updates. At most a clear takes 5 mins more.

So much new stuff. The war questline expands. Island expeditions get a couple of new locations to explore. Azerite armor gets tweaked so it’s slightly less stupid than it already is. While we wait for the servers to go back up, Blizzard’s prepared a handy survival guide for Tides of Vengeance. I suggest looking it over, or else risk not surviving at all.

Almost all quests in a zone will award reputation for that zone's faction. Be sure to go back and do all of the side quests in a zone in order to maximize your reputation gains. More reputation means more and faster access to gear and other world content. Each day, you should prioritize doing all of the World Quests that you are able to do, especially the ones in on the opposite faction's island for 7th Legion or Honorbound reputation in order to unlock the ninth Mythic dungeon and all parts of the War Campaign. Maintaining your mission table and champions will also prove to be a fruitful method of reputation acquisition as your champions and troops work passively to acquire reputation rewards while you actively earn reputation through World Quests, island expeditions, and other means!

Hillsbrad Foothills is just simply the best place to farm Tin. If you are an alliance player you should still go there, but Northern Stranglethorn is a great alternative. You will see a red zone on the map, that zone is filled with Tin, it's everywhere. When you mined all of it, just go outside of the zone where you can see the little yellowish arrows, mine a few Tin and head back to the red zone because it's most likely that the Tin Veins there are already respawned.
Even though you will invariably do a bit of soloing during your time in World of Warcraft, the game is a lot more fun when you have other people to interact with. Whether you’re starting out, or getting back into the swing of things, having helpful mentors feeding you suggestions (or gear, or gold) doesn’t hurt. The /r/wownoob subreddit is a good place to find friends to quest with, as is the main World of Warcraft subreddit (and don’t forget its helpful “Murloc Monday” thread for newbie Q&A).
I also noticed that the slowdowns were heating up my graphics card (a GTX1080 with good cooling and a well-configured fan curve). On high but not max settings, I would always hover around 60-65 degrees C, and thought this was normal. After turning auto zoom off, I noticed that my card never gets past 49 degrees C. I'm pretty shocked, as it's a very hot day where I am and I didn't know one feature could affect temps so much. I didn't know my temps could even get that low! Even on full max settings (with 200% resolution scaling etc.), it now can't go over 66 degrees, whereas it used to go up to 74 degrees at times when auto zoom was on.
Certain locations in World of Warcraft – primarily inns, capital cities, and private instanced zones like your garrison or class order hall – are rest areas. You know you’ve entered one because your character portrait will gain a “Zzz” icon where your level is normally shown, and because you can immediately log out of the game instead of waiting 20 seconds.