Avoid loose-fitting pants. You want to be able to feel your wallet against your leg at all times. Following this simple step alone will most likely save you any hassle from a street thief.
Carry a dummy wallet. Before heading out each day, slip the dummy wallet into your back pocket, making it more obvious to someone who might be following you. Carrying your real wallet in your front pocket.
Store most of your wallet's contents in a safe place in your hotel room, including unnecessary cards, forms of identification (like your passport), and extra cash. Carry only what you think you might need for that day's activities, plus a little extra in case of emergency.
Keep your wallet's contents hidden from view when making purchases. In other words, don't flash your cash to every taxi driver, street vendor, and hole-in-the-wall shopkeeper you meet.
Slip a couple extra 100-rupee notes inside your shoe, directly under your foot (or in some other equally-inaccessible area on your person). This way you'll always have a reserve, no matter what happens.
