I've migrated my personal email to a great web based application, gMail. I've stopped using Outlook for my personal calendar (inter-twined with my work calendar) and started using Google Calendar. But this post is not about those.
I've found a great task list manager application, again web based.
Remember The Milk
It lets you create multiple lists, prioritize, tag, set due dates, everything that a task list should do. You can send tasks to other people (as long as they are members, too). It will remind you in a variety of ways, including Text Message, Email, Instant Message (in almost every protocol). And on top of all that, it has a slick web interface. It will also export your task list to lay on top of any calendar that supports the iCalendar standard.
And it is all free.
This has allowed me to move my task list (both personal and work) out of Outlook.
With it all being web based, my task list is at any computer attached to the internet, be it at the library, one of the several in my house or...
There are some really great apps out there on the web and this is counted as one of them. Check it out. Manage your life.