Here's an interesting twist on protecting your cards that have RFID chips for NFC. Tumi are promoting what they call 'ID Lock'.
This item offers added security with protection against identity theft. It features an exclusive and patent pending technology that shields your personal information encoded on credit cards, passports and other forms of identification from would-be thieves using invasive communication and electronic data reading devices.
Basically metal threads that work to act as a Faraday cage. That's pretty neat.