Here's how I track my own productivity: I take notes. I'm using Freemind these days. I have my code at the top of the screen and a mindmap at the bottom. On

Here's how I track my own productivity: I take notes. I'm using Freemind these days. I have my code at the top of the screen and a mindmap at the bottom. One of the nodes in that mindmap is a "ToDo" node that contains various tasks. As I work on a task - whenever I ask myself a question, or hit an error, or whatever, (usually around every 1-5 minutes) I'll make a note in the mindmap. I have another node called "Done" where I keep a log. Whenever I complete a big task, I move the node and all it's children from the ToDo node to the Done node. The child nodes in the Done node are organized by date. How you do it isn't the important thing. The important thing is that you can look back later and review your work.