shooting in fog

I need to figure out how to shoot on foggy days (since there are a lot of those in SF). Today was my first time shooting a person on a day where the sun just won't come out. These three images are the only ones I actually like from today. Anyone have some tips they could share about shooting in fog?

Morgan Wray

Original photo taken by Danny, retouched by yours truly.

Cannibalized vs Sam Guss

this is a photo shot by one of my favorite photographers, kyrstal layton (aka cannibalized).
she let me do some retouching on the image :)

here's a comparison of my edit next to her already awesome unworked image.

Fetish Factory's Medical Party 2010

dreamtime

Ruby does Poison Ivy