Shooting Clouds...!

What you want to do is always underexpose the shot so make sure you're shooting in manual
mode, use your camera's internal light meter and snap away. I'll usually try to shoot no faster
than say, 1000th of a second and I counter the exposure by simply raising my f/Stop to f/8 or
higher. I'm also shooting w/ my ISO set @ 100. Have fun and shoot til it clicks in your head...! :)