[skrebbel]

Use a decent editor.

[middus]

Alternatively, you could continue using your editor of choice for editing and use grep to identify TODOs in your code.

[andywaite]

Yes, if you're disciplined, and remember to do this regularly. But humans aren't perfect.

[oinksoft]

In smaller codebases you can use a git hook to display your TODOS: http://oinksoft.com/blog/view/5/