Matt Gemmell, writing about managing email:
Don’t worry: this isn’t yet another Getting Things Done love-in. GTD probably works, but it doesn’t work for you (or me). There are plenty of great apps to help you manage your life and your tasks, like OmniFocus and so on, but they won’t work for you. You won’t devote the time to organise all the stuff.
You won’t create contexts, and you certainly won’t file stuff appropriately. You won’t do your weekly review. You’re also probably not the overall person in charge of the next Mars mission. Those systems are not for normal people; they’re for obsessive-compulsives who just happen to prefer filtering email than counting toothpicks or quadruple-checking that the oven is off.
Couldn’t agree more. Todo apps are a lot like software processes: they’re only as effective as the people involved.