PingMe may be a useful service for those of you using a GTD system (perhaps paper-based) without suitable reminder functionality, especially when you are on the road.
Creating, receiving, sharing and renegotiating reminders (Pings) are all possible according to the PingMe website:
To read more about this:
- PingMe website
- PingMe Offers Automated Nagging (Web Worker Daily)
- PingMe Annoys the Hell Out of You To Make Sure You Get Things Done (Mashable)
- Set up quick SMS reminders with PingMe (Lifehacker)
Let us know if and how you are able to successfully apply this to your current GTD system!