There are lots of ways to waste time. One such example involves not checking the time properly, resulting in me having to go back and forth between the Central Library and Causeway Bay MTR at least one and a half times. That's at least 30 min. + 10 min. time wasted settling down, and which could have been spent learning new Chinese characters at the self-study language center (which I was in the middle of doing until I broke off from it thinking that it was already time to go). Let's also not forget the amount of time it takes to wait for the lift, walk across the hall, cross at least two streets, AND avoid the crowd and throngs of people snaking in the opposite direction.