A fun way to see Hong Kong is to ride on one of its famous DingDing* trams. Hong Kong runs double decker trams exclusively on its tramway system, and for a small sum of money, you can climb aboard the upper deck, sit back and watch the city go by.
It's not only a great way to people watch, but getting on a tram will allow you to see the various neighborhoods of Hong Kong, from the modern glass and concrete skyscrapers of the financial district, the ritzy designer shops in the shopping mecca of Causeway Bay, the energy of the race track (you can see the horses race from the tram!) to densely packed residential apartments and street level open air markets.
Trams run frequently during peak hours. You'll only have to wait 90 seconds before the next one comes by. So load up your Octopus Card and give yourself a couple hours to go back and forth from Shau Kei Wan to Kennedy Town. Look! Here comes the next tram...
*Residents of Hong Kong call the trams "DingDing" after the double bell sound that warns pedestrians of a tram's approach.