What all these systems lack is an element of responsibility to another person. When a human calls me to remind me of something, I take it a lot more seriously

What all these systems lack is an element of responsibility to another person. When a human calls me to remind me of something, I take it a lot more seriously than I do a computer or something written on a piece of paper. What if a system combined the best elements of an automated system with some human responsibility? What if all of your reminders are text messages from human experts on the type of task you need to complete? And your replies actually go back to that person and they are notified of your failures to reply as well. People really need help in breaking down goals in the smallest possible tasks, the approach GTD really encourages. That should be a strong element and human experts can help with this too. And your experts can be anywhere in the world these days. Combine GTD and the Four Hour Work Week.