I plan to stay for 8days 7nights in Hong Kong. Any recommendations for places for good food?

Oh, these days are totally enough for you to visit and cover main attractions in HK.
For accommodation, Nathan Road is a good option. You can easily find several nice and budget hotels in this area, such as Chungking Mansions. This place is close to Tsim Sha Tsui & East Tsim Sha Tsui Metro Station. You can easily take MTR to arrive at several scenic areas and shopping centers.
For shopping, Central, North Point, Admiralty, Causeway Bay, Tsim Sha Tsui, Yau Ma Tei, Jordan and Mong Kok are popular areas for shopping and eating. Besides, English is widely used in this area. It won't be difficult for you to find the right direction. Enjoy your holiday!

Thanks Alex. This is my first time travelling. Can you help by recommend more hotel choice for me?

You can consider Jing Kung City Hotel in Flat 3, 8/F, Block C, Tsim Sha Tsui Mansion, No. 87, Nathan Road. It costs HKD 200-500 per night. You can book a room by dialing at 00852-56462206. Have a try!