Professions: This may seem strange for a leveling guide, but the first opportunity you get, pick up both the Mining and Herbalism gathering professions. Not only will this allow you to track many various quest objectives on your map, but you also get a fair amount of experience whenever you gather. I'd put it at around 10% of a quest turn-in per gather. Since most of your wasted time in WoW is travel time, stopping to gather ore or herbs can keep your exp/h rolling as long as you don't go too far out of your way. You should only gather if it's convenient, and on the way to an actual quest objective. Don't make gathering your priority.
It's not an enchantment, but you should buy or craft an iLVL 100+ belt, gloves, or boots with a gem socket for use with the new 5% bonus experience gem: Insightful Rubellite. I used a vendor-bought belt from the legacy valor vendor in Orgrimmar, since it was convenient and met the minimum ilvl bonus. Keep these in your bags until you can equip them, which should be just in time for treasure collections in WoD content. I didn't ever replace the belt until I dinged 110, since I didn't feel the stats from later upgraded belt drops made enough of a difference to outweigh the 5% bonus. This is explained below, in the WoD treasure section.
“The biggest struggle of overhauls like item scaling is being able to exhaustively test it,” he said. “You can’t expect any group of a few hundred people to go in and hit every piece of content that’s ever been developed over the past 15 years of World of Warcraft. That is difficult and challenging to do. What we did was listen to a lot of feedback from the PTR, what those changes looked like there. “The community is a great resource for helping us understand what we missed, and we were able to develop technology to be agile about fixing the problems very quickly in a live environment when we did come across them. We did have a few hiccups when we launched the patch in terms of scaling issues, but a lot of those were addressed rather quickly and that’s due to the technology we’ve developed to hot-fix our servers and almost anything in the game without down-time.”
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