What’s in a productivity system?

You can learn a lot about somebody just by learning about how they get things done. Are they the sort of person who might have a perfectly color-coded email inbox, a flawlessly organized to-do list, and what’s that, they just sent you a calendar invite for happy hour next week? Or are they more likely to have a giant pile of sticky notes they never look at, a computer desktop with so many files you can’t even see the wallpaper, and today’s main tasks written on their arm? Neither is wrong, but they’re very different.