Layering: your new BFF

Ah, who doesn't love light layers? They're cool, fresh and just the right amount of "sexy" for a summer job. Just remember: "if one layer is body hugging, the other layer should sit on you a bit loosely," Roberts says. For example, a thinner cotton tank is perfect to wear under a silk cardigan. And feel free to play with textures, rather than sticking to just one. "I wouldn't wear cotton on top of cotton," Roberts says.

Next: A casual-but-still-cute outfit for an outdoorsy job