Observation, anticipation and planning are the keys to just about everything really, nothing to add apart from: Turn off the rear fog lights when visibility is restored!!!!
Front fogs are a non issue - they cast a low wide beam pattern (if they have not been pimped up with HiD lamps, which have no place in fog lights due to totally wrong spectral colour distribution). Leaving them on is silly and pointless but it's also harmless.
In heavy fog I switch to sidelights and use front fog lights to provide close range vision. Basically, if you are using front fogs your speeds are likely to be very low indeed due to severely impaired visibility. Most cars will only allow rear fogs to be turned on with front fogs, if they are fitted. This is a clue to how bad vision needs to be before you switch on the rear ones. HID dips are a nuisance in fog, the shorter wavelengths of light that comprise a larger part of the total output of such lamps does nothing to aid your vision - the reflex from the fog can be an impediment to vision.
I'd like to see a return to selective yellow for front fog lights.
