From the Whitson Gordon author:
If you prefer something that tracks what you’re doing at all times, I can’t recommend RescueTime enough. It’s how I started reclaiming my time in only seven days, and it’s a great way to see where your workday’s falling apart. Just sign up, download the app, and let it run. After a few days, you can see how much time you’ve spent in certain apps and on certain web sites, and categorize them into “productive” and “unproductive” activities.
We couldn’t be more pleased! Thanks LifeHacker and Whitson!