Many hardcore Warcraft gamers use add-ons. Basically, they make it possible to rearrange things for ease of use and to make your interface much less cluttered. There are bars that make all your buttons 1/4 smaller than original, letting you fit more buttons into a smaller area.
There is an add-on called Necrosis, which is a great tool for Warlocks. It shows how many soul shards you have left and has small buttons with quick access to your demonic spells.
How do you choose the best add-on for your character? You can simply Google, or you could check out http://wow.curse.com/downloads/addons/
There are hundreds of different tools to help you level faster, guide you through quests, raid more efficiently, and make vast amounts of gold to quickly turn you into a tycoon.
Many people are kind of stand-offish on the idea of editing the contents of an installed software folder. That’s why I’m going to guide you through installing your add-ons without screwing up your game. Nothing takes longer to reinstall that World of Warcraft.
Okay, that’s it. One other tip, when searching through the multitude of add-ons and tools available for your World of Warcraft software, be sure you download from reputable creators and don’t download anything that involves a risk of you being banned from your servers.
Alright, now go play.