As a frequent visitor of Hong Kong, below is quick read on what to do there. Hong Kong Island is probably half the size of Manhattan and you can probably explore it in less than four days. It has great public transportation, especially the modern subway. Traveling by train is probably the best way to avoid traffic congestion on buses.
Central – The central business district. Lots of people. Lots of shopping - probably the most Chanel, LV, Armani, etc. store per capita in the world. There’s a building called IFC2 by the pier. It has lots of food and hip bar: Isola, Red, etc. IFC2 has a ferry terminal that can take passengers to Kowloon Island – the Star Ferry.
Lan Kwai Fong (LFK) – located in Central. It’s got a lot of historical houses built on slopes. It’s a place where Westerners go for happy hour. Tons of hip restaurants and bars. Very diverse crowd.
Soho – a 10 minute walk from LFK (more like elevator ride). It’s got more restaurants. More trendy…
Victoria Peak – Located in Central. Take the cable car up to the top of the mountain and get a panoramic view of Hong Kong and Kowloon.
Causeway Bay – probably the busiest intersection in Asia. Causeway Bay has a Time Square. It’s the area where locals and foreigners shop.
Aberdeen – located on the other side of HK island (HK is separated by a large mountain). Arberdeen has great seafood.
Repulse Bay – a resort like area near Aberdeen. It’s got a nice beach and very quiet. It’s where the locals go to get away form City life. You can take a bus from Admiralty or Central to get to Repulse Bay. It is also on the way to Stanley.
Stanley Market – a walking flea market where you can pick up local art work and enjoy local food. It’s also off the beach. The Murray Building is one of the landmarks - old government building that was moved from Central. Not too far from Repulse Bay.
Kowloon Island is located across the channel from Hong Kong Island. I highly recommend taking the Star Ferry (US$2 or less) which takes you from Wai Chai or Central (IFC2) to Kowloon. At one point, the ferry was the only way to go from one island to another. While in Kowloon, check out:
Tsim Sha Tsui Promenade – the Star Ferry will drop you off at the Promenade. There are museums and shops along the Promenade. It also offers a great view of the Hong Kong skyline, especially at night. There’s also the Kowloon Walk of Fame (not quite Hollywood).
The Old Railway Tower – a landmark of Hong Kong is also located along the Promenade. It is also a concert hall and great place to get a panoramic view of Hong Kong Island.
Tsim Sha Tsui – perpendicular to the promenade are filed with shops – from brand names to local designers. The top floor of the Peninsula Hotel offers a great view of HK at night. They serve drinks and dinner up there. Felix and Aqua (on One Peking Road building) is good spot for drinks and view.
Temple Street Market or Mong Kok Market – it’s a flea market worth checking out. It has pretty good street food as well.
Tian Tan Buddha – located on Lantau Island (by the airport) would be a good hiking experience. You’ll have to take the ferry from HK to get there.