Every morning I think about what I am going to do today. So I take a paper and start to write things like:
[ ] Call Mr. XYZ
[ ] Answer Support E-Mails
[ ] Reduce website header height by 20 px
[ ] Create new navigation bar icons
And every time I'm done with something, I paint a checkmark in this square. On paper. It would be fun to have something like this as an application. But I don't want a heavy project management tool or integration with email. It should be like download, install, use without fat configuration and steep learning curve. usually I don't schedule my to do's, I just write down every day what I want to accomplish today.
For my experience it doesn't make sense to plan what to do next week, because next week everything looks totally different.
Would be cool if such a simple utility exists. At the moment I try just using textEdit and deleting rows which are done. With a nice interface, this would be much more fun.