Helpful Addons
LootFilter - Will weed out all the trash you don't want. But remember, stackable trash can be VERY profitable if you vendor it.
Link: Loot Filter
WRUGS - This is awesome. It means people not in your guild or friends list get blocked and cannot contact you if you have privacy enabled. It means random group invites, spam messages and people trying to ask you about botting are blocked. Just another small security measure which can go a long way.
Link: WRUGS Anti-Spam | World of Warcraft Addons | Curse
Type: /wrugs privacy on
Fubar - Know your durability, gold per hour, anything else. Also lets you track the weekly and daily and hourly gold habits. I definitely recommend this lightweight addon.
Link: FuBar 3.0 | World of Warcraft Addons | World of Warcraft @ Curse.com
Auctioneer - Gives advice on buying/selling prices for anything in the AH. It learns from the AH what the average server price is for everything, and then you can price your goods accordingly. *Thanks to Winchester*
Link: Auctioneer addon for World of Warcraft
QuestTracker - Everything to track your quests - minimap marking, co-ordinates and more!! Helpful for when you are grinding mobs that are included in quests.
Link: QuestHelper | World of Warcraft Addons | World of Warcraft @ Curse.com
Mob Map - User-run database that logs all mobs, monsters, loot, NPC on your minimap.
Link: MobMap - the ingame WoW position database
Tom Tom - Uses guiding and Gnomish Sattelite Navigation to guide you around the world! Shows you the way to quests, mobs, items etc.
Link:WoWInterface Downloads : Map Mods, coords/compasses : TomTom
Lightheaded - Used with Tom Tom. Pulls lots of quest info off WoWHead and shows it to you. Works with TomTom to show you where you have to go for quests.
Link: WoWInterface Downloads : Quest/Leveling/Reputation Mods : LightHeaded