Technically, I watch the metering and treat it like a big grey card. More often than not I have to dial in a stop of overexposure.
Most interesting mist patterns I see when I'm on the motorway and therefore doing, erm, 70mph [officer] and unfortunately I never have the time to stop! Pity, because the perfect landscape light occurs during my drive to work at this time of year....
Maybe one day I'll force myself up even earlier and take advantage of the pre-dawn...