Michael Keithley has been focusing on productivity since when paper planners were the only options. He became an early adopter of digital tools, and still has a technology graveyard of PDAs and other electronic productivity tools. For GTD, his first digital tool was Evernote, which he still likes for reference. Later he landed on OmniFocus, and has been using it from early on, to the most recent version. He emphasizes that it's important for a digital system to allow for sending an email to the list manager. You can watch the entire conversation from October 2025 at GTD Connect.