Create a Bank Alt and level it up to level 5 - The leveling part is very important because you can pick up Enchanting after you reach it. In Classic, you can disenchant EVERY uncommon item of every level, if you have the enchanting profession. Disenchanting weak BoE Uncommon Items and selling Enchanting Materials on AH will help you make some extra money out of otherwise Vendor-destined gear. The Bank Alt will also serve as your high-capacity storage for various items* that are bound to rise in value over time or might come in handy at a later date. Overall, this is a must-have, as it will improve your overall leveling and Gold-making efficiency, let you store additional items, allow you to consolidate your Gold on a single character, and provide you with a way of squeezing some extra Gold out of various Items.
Although WoW currency can be found through quests, fallen enemies or the dreaded "farming" process, doing it the conventional way is time-consuming. Considering the upcoming release of the Legion expansion pack in August of 2016, stocking up on gold is more important than ever. This way, you can spend less time farming and more time buying everything you need to tackle the next set of challenges.
Jadefire Betrayers, Hellcallers, and Tricksters (marked RED on the map) - These foul Satyrs infest north-western part of Felwood. Slaying them will help Druids reclaim Felwood, and provide you with a lot of Gold. These Satyrs drop a lot of Runecloth, Felcloth (the main source of income from this spot, check the AH prices), 16 Slot Bags, Vendor Trash Items, and some Pocket Money. Satyrs can be Pickpocketed, so this spot is especially good for Rogues. Recommended Level - 52+ (54+ to be extra safe, as Satyrs can be problematic because they tend to run away on low health and pull additional enemies).
Escort quests can take awhile to do. I have thoroughly tested all the escort quests in the game for time/xp. Most are worth doing, but as long as you are able to actually do them without failing. Most require you to pay special attention to the escortee as most are fragile and will die easily, so do your best to keep mobs off of the escortee during escort quests. The longest one in the game is the Tanaris chicken escort. The chicken escorts are only worth doing if you were able to do all 3 of them, as if you do, you will be able to turn in an additional easy quick XP turn in quest at BB, which makes them worth it.
WoW Classic seeks to recreate the "vanilla WoW" experience—that is, WoW as it existed before a series of seven game-altering major expansion packs from 2007's The Burning Crusade to 2018's Battle for Azeroth. To achieve this, Blizzard has rebuilt the game based on archived data from back in 2005 and 2006 (patch 1.12 is the goalpost—the current game is on patch 8.1.5). The company has committed to meticulously presenting the experience exactly as it was back then—warts and all—with only a small number of unavoidable or critical changes.