I just came across a neat new tool, called Ta-da Lists, which allows you to make lists of things you need to do, such as Bills to Pay, Things to do for the Holidays, Search Engines to Submit to, Blog Articles to Write, Directories to Link to, etc. To-Do lists are one of the suite of elements that belong to Basecamp, the brilliant project management tool created by the same team. The cost of Ta-da Lists is free and is well worth trying out - it even lets you share your lists with others and even to subscribe to your lists in RSS!
Ta-da Lists - Keeping is simple. (Marketing Playbook)