Occasionally I run across tips from other players in-game come within shouting distance of being a WoW-style life hack. There are two I can think of off the top of my head that made a noticeable difference to the ease of my play time, and they both have something to do with the Dungeon Finder/Raid Finder.
- If you're queuing for raids or 5-mans as a healer and aren't currently in your healing spec, don't immediately accept an invite. The timer is just long enough to allow you to respec and drink before entering the dungeon. If you do so within the dungeon, you run the risk of watching an impatient tank drop to half or even no health before you finish respeccing.
- If you're trying to gear a fresh character at level 85, do your dungeons/raids earlier in the week and not later. A higher percentage of players are on their mains at that point, which tend to be better-geared and -played than their alts.