David Allen's 'Getting Things Done' methodology has become quite popular among those who want to organize their time a bit better.
Inspired by GTD, Shuffle is based around the principle that writing things down helps you get them out of your mind. The mobile app allows you quickly create and organize your actions, and helps you split larger projects into smaller, more manageable tasks.
The program is certainly pretty simple to use, and there's a neat demonstration included that shows you exactly how useful Shuffle can be. It's a good idea to have a look at this first, so you can get a feel for the way things are structured. Essentially what you do is create a series of projects and actions, entering the due date for each, plus any additional information you want to put. You can easily link actions to projects, and to help you break things down even further you can tag each action with a 'Context', such as 'At Home', 'At Work', 'Online', 'Errands' and 'Contact', each with its own gleaming icon.
This information in Shuffle is all very well presented and the main menu is broken down into handy categories, such as 'Inbox', 'Due Actions', 'Next Actions' or 'Projects'. The way this is displayed can be customized through the settings menu and you can also choose to clean up any data that's no longer relevant.
Perhaps the one thing that's lacking from Shuffle is an alarm feature to remind you of when tasks are due to be completed, but hopefully we'll see this in future releases.
All in all though, Shuffle is a very intuitive program that really embraces the Getting Things Done ethos.