The best way to get natural photos is to hang around long enough so people get used to your presence and go about their business, not paying attention to the camera anymore.
This photo (above) was taken at the covered market in Dadar, a very busy neighborhood in the heart of Mumbai. The local train station is one of the most crowded in the city, as thousands of passengers change trains here between the Western and Central lines. The market is a great hideout from the hassle and bustle of the area.
Capturing natural photos is a challenge in places like this as the vendors regard someone with a camera as a moment of entertainment in their ordinary day. The best thing to do is just wait until people get used to your presence. Eventually they will begin to relax, go about their business, and start to ignore the camera.
The picture below was taken at the Babulnath Temple. It is an ancient Shiva temple on a small hillock near Girgaum Chowpatty, Mumbai's most famous beach. Mumbai is a busy modern city and you don't see much spirituality. Look closer, though, and you will find pictures of Hindu gods on many walls.
When I saw this man, I knew I had to photograph him. I had been shooting in Mumbai for more than a year then and hadn’t got a picture of a holy man yet - it is not easy to find them here. Using gestures, I asked for a photo. He didn't mind, and patiently posed.
In many places in India holy men ask tourists for money for photos. Not in Mumbai, which is not a tourist city. He was a genuine person.