Hong Kong is one of my favorite cities. If you only have two days to spend in Hong Kong, I suggest going on a Friday and Saturday. And here is what I suggest that you do while there....
8am Visit the Buddha
Wake up at 8am and make your way to see Tian Tan Buddha aka Big Buddha. If you are taking the Gondola up to the statue, I suggest that you book your tickets in advance. You will need to print that out and bring them with you. It's very easy to find tickets online. These tickets will ensure that you don't suffer 3-5 excruciating hours waiting in line.
Make sure that when you are atop the mountain that you check out the Po Lin Monastery. There are 10,000 golden buddhas inside!
1pm Lunch on the Beach
Take the Metro back to HK island. You'll need to grab lunch before heading out the beach. I usually get a few sandwiches from Wellcome Grocery store or Pret-a-Manger. Then hop a taxi to Shek-O Beach. Shek-O is one of the most popular beaches in HK.
If you want something a little more secluded try Deep Water Bay Beach.
And if you fancy a more upscale experience, head to Repulse Bay. Grab lunch at one of the restaurants on the boardwalk. And if you love the beach scenery but don't love the sand, you can reserve your own private pool at Cabana overlooking the beach.
7pm Fill your Belly with Bao's
Once you've washed all the sand away and had a chance to catch your breath in your hotel, head to dinner in Sheung Wan. My favorite restaurant in all of HK is Little Bao's. Prepare for your tastebuds to explode and your belt to expand. Also prepare for a wait, it usually takes around an hour to get a table. I usually head across the street to the PMQ to do a little shopping. The restaurant will text you when your spot is available. Also the restaurant it small, not ideal for a large group.
10pm Hit the Roof
Once your belly is full, head to Ce La Vie in Lan Kwai Fong on D'Aguilar street. The restaurant is in a Ho Lee highrise building in the center of LKF. The drinks are expensive and the music is usually horrible... so just head to the roof, snap your photos for the gram and leave!
10:15pm Hit the Streets