Laugh at me if you want, but for a 1-man team, about a year and half ago I started using post-its on my window. First I did it as a semi-joke. But about a month later I just loved it, and I'm still using it when I'm on my own. Left window is todo and in-progress, right window is "done". Not only code related tasks, but everything work related non-trivial task. I clear the right window about once a week.

The left window shows a good estimation of my current workload and progress, and the right one shows my velocity (beside other things).

My only problem is that it doesn't really scale for bigger teams:(