With so much talk of dust on the D600 sensor, the issue of it being related to lens changes has been skirted a few times. Given that so many of us are afflicted with NAS, it's inevitable that we all have more lenses than bodies and are therefore prone to changing lenses relatively frequently. So what do you all do to try and minimize the impact of dust? Do you do things in a certain order? Do you only change lenses in certain places? Thought it might be worthwhile to share.