During the Motorola International Strategy Competition, I discovered a new GTD tool called Jott. While the competing teams were planning the future of web 2.0 services, social networking, p2p content management, and capturing value in the Long Tail, I realized that a lot of these ideas are here today. The Jott service is simple email anywhere application. Jut sign up for Jott, then add a toll free number to your cellphone's speed dial. Whenever you want to send yourself a message, call up the number and dictate a thought. Jott will transcribe the message it and send it you in an email, along with a link to the recorded message. You can also use Jott to send dictated email's to your friends. In addition, you can easily import your address book from gmail, outlook, yahoo, etc. and you can now "jott" to your contacts.
I setup one of my contacts by enabling the blog via email function on blogger, so now I can literally phone in blogs with my cell phone. Now that's seamless mobility. Oh did I mention this is a free service?

I recently added Jott to my GTD workflow. It's a painless way to get to-do items or notes into your GTD inbox. Here is a great guide in how to get the most from JOTT and GMAIL by another GTDer.