How do you store / arrange the guns in your safe?

I have a large safe but the space is not used efficiently. I keep mostly handguns but the safe came partially set up for long guns. Can probably fix that with new shelving. The next concern is arranging, standing the guns, etc. Quite frankly, I am a slob. I've got revolvers laying sideways, tessellated across the shelving and semi-autos upside down with grips in the air and packed together like books on a shelf. This is inefficient and probably not best for long term storage, even though things get moved and wiped down every few months.

So, what are you guys using for pistol racks? Any good, cheap, homemade set-ups? I would like to stand the guns right-side up on a rack with few points of contact to minimize corrosion concerns. Any ideas, pictures, etc?
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