title: How do you track time spent working on a project?
body: <p>I'm not looking for anything complicated or enterprisey. I'm wondering if there exists something simple where I can "punch" in an out and say what I was working on. I'm interested in both how long I spend on different projects and how much I actually work per day. A command line tool would be preferable, but feel free to recommend anything you find useful. It must run on Unix-line OSes (at least Linux, Mac would be good too but not crucial)</p>