I read "168 hours" by Laura Vanderkam and I found it very interesting for taking away activities that can be considered a waste of time. In general this was a good way to track how my time is being spent on a week by week basis.
My question is: are there similar books out there, that you would recommend (I have been looking through Amazon's (customer's also bought), GoodReads and also book reviews but haven't been able to find anything similar).