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.
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.
Edit 20 It’s been a week since this post and a lot of people are still reaching out to me with questions which is fine. I have had a few different people reach out to me to help make YouTube videos based off this guide and more info in BFA which I’m more than willing to do. Whoever gets the videos up first I will link them here for you guys to enjoy.