Rescue time
I was introduced to Rescue time in 2009 by Matt. Ever since, I have been using the free version, I upgraded to the pro version last year and I absolutely love it. If you don’t know what rescue time is, it is a time tracking utility for your computer. I have tracked 5300 hours of my life so far. Whoa! that is huge amount of time on the computer and it is a large amount of data about me and how I have spent my time over the past few years. There is a lot of insight about me and my habits from this data and I use it improve myself and keep my focus on what is better for me.
I would definitely recommend this to anyone. Try out the free version or buy the pro version from here. If you are looking for an in depth review of Rescuetime, Shawn has you covered here.