Polka dots and stripes are two things that never go out of style, and lately, I've been loving the idea of pairing the seemingly mismatched patterns together. Even Rachel Zoe agrees it's a great way to create contrast in your look. The general rule of thumb is to pick a color scheme, choose two pieces in your ensemble to highlight, and keep the rest of your look neutral. To make this style your own, start with a fun, oversize hair accessory, similar to the bows that were so popular at Marc Jacobs's Spring show, and pick your patterns. For instance, a black and white polka-dotted headband with a coordinating striped top is fun and flirty. Try it; you'll see.