Two services I use to help with GTD (Getting Things Done) are Google Calendar to keep me up on what events, meetings, gatherings, ect. and Remember the Milk to keep track of work and personal tasks to be completed.

Another service I use as you may know on a daily and sometimes hourly basis is twitter which I think pretty much any geek knows what that is by now

What is kool now is you have the ability to send direct commands to both services via your twitter account. First all you have to do is of course have a google calendar or rtm account…subscribe to them on twitter which for remember the milk is rtm and for google calendar is twittercal or gcal on the twitter service.

After you have that all setup it is pretty simple in that you just have to send direct messages to those twitter accounts which in turn will add the information to the respective account.

ie for twittercal – d gcal meeting tomorrow at 2 PM.

good sources of info:
twittercal page
remember the milk on twitter info

Also feel free to shoot me an email or twitter message if you have any questions.