From a Technology Review interview with David Allen, author of Getting Things Done…

Technology Review: Computers and the Internet let us do more things, but can they really help us get more things done? How does technology fit into a good time-management system?

David Allen: First of all, you don’t manage time. Time is time, and it can’t be managed. What you manage are commitments. The calendar will let you manage, at a maximum, three or four percent of what you have to do. What you really need is a way to keep track of your commitments. Then you start to get a sense of the huge volume of commitments you’ve made, and you are able to review those commitments.

Which reminds me… I bought a copy of Getting Things Done a while back, but I’ve been too busy to get around to reading it yet.