i am going to stay in hong kong for 2 nights. how should i plan my tour to see most of it?

Actually, you can do the tour in HK by yourself. I'd like to arrange a simple itinerary for you:
Day 1: Ocean Park, Stanley Market, the Peak, Victoria Harbour, Avenue of Stars, A Symphony of Lights, Temple Night Street
Day 2: Ngong Ping 360, Disneyland (If you are interested in), Mongkok area
Day 3: Central, Causeway Bay, do some shopping