In my last post, I talked about using "notes to yourself" as a means to build fodder for status reports, track completed activities, etc.
Jott is a service that allows you to call a phone number and leave a voice message to yourself or any number of predefined recipients (or groups of recipients via a Jottcast). After you leave your "Jott," the service converts it to text and sends it to you or your chosen recipient via email. Very cool. They even provide a link to listen to the original audio recording in case you suspect something's gone awry in the translation.
As with the method of sending an email to yourself, this just becomes a part of your inbox processing workflow (a la GTD) and you can act on or file the email as appropriate.
I have a speed dial key on my Blackberry to make it easier to use this - I just hold down J, and it connects me to Jott. Simple as can be, and easy to incorporate into my habits.
By the way - Jott continues to improve the service and make it even more user-friendly. They've already done a "version 2" upgrade since I've been using it.