If your attention at work tends to wander at times (and whose doesn't?), you may be looking for ways of improving your efficency. A first step might be using something like Rescue Time. A browser based solution with a desktop client, Rescue Time monitors your computer use and supplies you with a whole dashboard of analysis. I found its admonitory eye made me much less likely to check out the latest news or blogs and focus on the task at hand. Time will tell if that effect fades away. Rescue Time also ranks you with other users of the service, so if you are competive, maintaining a high efficiency rating may be an additional motivating factor. Rescue Time can be integrated with Google and offers a fairly full-featured free account.