IPhone Tripod Adaptor - $12.95 on Amazon. You can keep your shots stable,and tilt and pan with this bad boy
Vidpro SK-22 Professional Skater Dolly - $69.95 on Amazon. This is more expensive but makes for the coolest dolly and tracking shots. This one is also cool because you can hook a DSLR to it.
Selfie Stick- $5-$20 Amazon. They seem silly but you can use this if you’re in a pinch for a stable shot of yourself, or even a pan or boom shot.
Light Reflector Diffuser Kit - $13.98 Amazon. These are magic, and I take them to every shoot to help naturally control the light. They also sell mini versions of these for IPhone shooters at photojojo.com