I found the trick to mixing prints is to keep them the same colour (black and white) or at least in the same colour family, and to mix smaller prints with larger prints (I did big stripes on top and a smaller circular print on the bottom).
Pants: Old Navy
Necklace: Vintage
Sunglasses: Old Navy
Bag: JNB
Shoes: Call It Spring
Lipstick: MAC Cockney