"The way the glyph market works on most realms is that there are a couple of people willing to put in the long hours who will have every available glyph posted profitably, and undercut within minutes of being undercut. They all reduce the price very minimally when undercutting, and the "competition" isn't about price, it's about who can relist more frequently.
On top of that, after several expansions of making trade goods more plentiful, Blizzard is making components for common consumables scarce again in Battle for Azeroth. The new flasks require a rare herb called Anchor Weed, which spawns randomly in place of other herbs, so it’s not plentiful anywhere and is difficult to farm in quantity. It’s much more precious than any commodity that herbalists have seen in several expansions.
Most of the time you spend leveling will involve questing and slaying monsters, but there’s also a lot of travel. Travel earns you little experience (you do gain a bit for discovering new areas), so it’s wise to keep travel to a minimum. The new level scaling system, which scales zones to your level within a preset range, helps with that. You can choose what zones you want to experience and stick with them until you finish their quests.
Instead, go to Timeless Isle and take the portal to Gorgrond. From there, fly to your respective faction starting zone(Frostfire Ridge or SMV), go to your garrison, and do the quests to unlock your garrison(A short quest chain beginning down near the water where you'd otherwise start after the Dark Portal scenario). For now DO NOT collect any more treasures than absolutely needed to buy 1 or 2 experience potions! Treasures continue to be worth superior exp/h all the way to level 107!!! You don't want to begin collecting them until lvl 100 or later.
Third: Do Warfront when you can (if they open for the first week which I haven’t read anything that says they aren’t) because it gives a 370 piece of gear and gives you access to Arathi Highlands where you can kill a world boss and do quest for rep. They did remove the 355 drops (despite what Preach said in his last video, I just went and checked it before typing this up) and they only drop 280.
If you already have a high-level character and want to quickly level up a new one, by far the best tools for the job are the items labeled “heirloom gear.” These pieces of gear have two very special properties — they bind to your account, so any character you own can use them, and they grant bonus experience. Their stats also scale with your character’s level up to a certain point, so you can equip a fresh character with heirloom gear and power through much of the game.