David Allen speaks at google explaining the concepts behind Getting Things Done(GTD). He shows how to identify when you are off track and how to get back on. One point that I liked was that we can only store a few reminders in our head. We need to develop systems so we can overcome these limitation and juggle more responsibilities. One of the most simple things we can do is to put reminders in places where they will be noticed when required. If you can do this properly you can let go of the task completely as you know the reminder will be in the right place when required. This is a big stress release as we can let go thinking about the task but we can also let go thinking about the reminder.