Hong Kong has a lot of nature around it to escape from the busy city, lots of islands, hiking trails, beaches, waterfalls etc. But if you’re staying in the city and want to escape the busy streets for a little while, go to the IFC building and take the elevator up to the Rooftop Gardens. It is a nice open area with benches, an amazing view over Kowloon and cool colored trees in the evening.
My favorite quick lunch place in Hong Kong is by far Mana! in Central. It is an organic fast food place where you can find salads, wholeweat or gluten-free flats, potato slices with to die for homemade ketchup, soups and healthy snacks. They also have different shakes (some of them quiet heavy tasting), fresh coconut and of course the wheatgrass shots.