Get reminders as you leave the house. If you use an online task manager like Google Tasks or Remember The Milk, it's easy to create a tag called "Leaving the House," "Leaving Work," etc., then create a QR code directing to that page. Post it at the door, or anywhere else you'll be sure to see it when leaving, then scan it for reminders of things you need to do before leaving. At the very least, you won't forget your phone anymore! Have you come up with some awesome uses for QR codes? Let us know.