Man, it's a cruel world out there for the lazy. But every so often you find offbeat but amazingly helpful mods that just work, and best of all, work unobtrusively without having to be diddled with every day or between characters and specs. For my part, I am completely ready to nominate OptiTaunt for whatever Total Slacker's Mod prize might exist. It's a tiny mod for tanks that tells your group, raid, and the player you're trying to taunt off of when a taunt is resisted or when the target is immune. It can also announce when you've had to blow mega-cooldown abilities like Challenging Roar, Shield Wall, and Frenzied Regeneration. Best of all, it whispers cute class-specific messages to the player who's pulled aggro (e.g. for Priests: "Warning! My Growl was resisted! Time for a final prayer!"). And you don't need to spend time worrying about settings between characters or specs as the mod will simply never activate on a toon that won't have to (or can't) taunt anything.
I love Titan, Cartographer is amazingly helpful, and we all depend on things like Omen, but OptiTaunt still wins the proverbial desert island contest for me. Sean could probably name dozen of mods like it off the top of his head, but I find any mod announcing a thinly-disguised version of "YOU'RE ALL SCREWED NOW!" pretty tough to beat. With that said, I'm trying to level some taunt-free classes to 70 before Wrath hits, so I'm on the lookout. Any suggestions for, say, a Shaman?