Toodledo!

Not totally Ed related but in terms of management of to do items, Toodledo is very adept at organizing them.  You can sort things which must be done by context, due date, and priority.  You can even set it up to send an email (try siri!) by cell to add an item immediately.  Check it out online at toodledo.com or download the app to sync throughout all of your devices.