Quote Originally Posted by Nicole Boenig-McGrade
I'm tired to trying to see my negs through the window or against bad lighting at night. Therefore, I'd like to get a collection of ideas/suggestions/warnings on how to build a good lightbox. I have seen a couple of posts on this subject on APUG and would like to get together peoples own accounts in the one thread on how to build a good lightbox.
Instead of a lightbox, consider placing a piece of tracing paper @ 20 cents behind the neg sheet and holding up to the light.

For a more up market version, get a couple of 12v 12 inch flouruescent automotive work lamps and put them behind the tracing paper. That's better than a light box :-)