Minor thing for any class, don't click. Keybind, or get a multi button mouse and use modifiers (shift/alt/ctrl etc) Also teach yourself to tab target for packs if you haven't yet. Nameplates can help you better decide which targets to go for too as long as the tank has threat on it already. If you ever see the blue square marked on a target when you're in a group, use trap launcher with freezing trap. Once you're feeling more comfortable with the game, look into a few basic addons like Deadly Boss Mods for encounter alerts and Recount for showing you a DPS meter. Maybe I'm getting too basic but better safe than vote kicked right?