Kaivax, a WoW forum community manager, revealed that WoW Classic's class design, battleground mechanics and stats on existing items will be set to their 1.12 state, despite the game releasing content that expands beyond that. This removes "progressive itemization," so if the stats on a specific piece of equipment was changed during the original updates, that won't take effect in this version.
Swim Speed Potions (used especially at lvl 37 for Faldir's Cove in Arathi Highlands and lvl 57 in WPL). Try to get multiple stacks of these. I also recommend keeping a stack of these always in your bags. You will frequently pass rivers and lakes and can use these potions to pass them faster through out the guide. Please note that these potions do not stack with Druid's Aquatic Form and Glyph of Aquatic Form.
Thalassian Base Camp (marked BLUE on the map) - Some Blood Elves have set up a camp in the northern parts of the Azshara. Blood Elf Reclaimers and Blood Elf Surveyors that can be encountered in the said camp are rather easy to kill and have very good Loot Table. The most notable items dropped by those Elves include Runecloth, Mageweave Cloth, 16 Slot Backpacks, various Vendor Trash Items (junk weapons, armor, and so on), and Pocket Money. They can also be Pickpocketed, so this spot presents an additional value for Rogues. Blood Elf Reclaimers have access to strong Fireball, Heal, and Renew Spells, so they should be interrupted when possible and prioritized. Recommended Level - 52+ (54+ to be extra safe, and farm Elves at an increased pace).
The third location and the last is in the Badlands. And another Whelpling spot, this time in the north-eastern part of badlands. Home to the Scalding Whelp with levels between 41 and 43, hp between 1500 and 1700 hundred and around 1800 armor.. which makes it one of the most balanced spots to grind for exp and gold. Skinning is pretty much required here to get the most out of this spot. During the 2 levels I grinded here made around 150 gold not counting the epic drop Ardent custodian. Most of the gold came from selling heavy and thick leather, small flame sacks, the grey items and lots of greens including plate items that sell pretty decent on the auction house...
Upgrade your bags as quickly as possible - This tip is closely connected to the previous one. Upgrading your bags quickly will ensure that you spend more time grinding and less time managing your inventory, which will increase your leveling speed and allow you to make some more money in the process. Bags are expensive, so it is a good idea to look for a Tailor who will make you a set of new bags for Materials and a small fee (you will surely loot some Cloths, so this will not cost you too much). There are also some Quests that reward you with Bags: