When it comes to staying organized I've tried all sorts of lists and programs and websites. Recently I can across RTM or Remember The Milk. Of course this catchy name made me look further to find a service that does everything I need.
Things I use:
- Reminders prior to something being due (to sms, email, and IM)
- Posting Todo's from email, sms, iphone, etc.
- Organizing multiple lists.
- Text to data: e.g. Due: "tomorrow 4pm" becomes "May 19th, 2009 4:00pm"
- Offline browsing with google gears.