This baby was not cold at all in her birthday suit. The fog was burning off on what was to be a lovely spring day, but despite the diffuse light I added a pop of fill flash (with diffuser) - flash at about -1/3 power.
It's all about background. Indoors or out, I try to find backgrounds that sing out: Fresh! New! I avoid dark backgrounds (unless intentionally contrasting, like with newborn silhouettes) - I mean, there must be a reason why it is hard to find black baby clothes.