Cataloging my collection is on the list, but a simultaneous project is taking the instructions for my 300-400 lights & organizing them by maker. It is so easy to just Google a light if I have forgotten how to access hidden modes or some other feature I keep putting it off. I also have three large clear plastic compartmented cases that have all spare o-rings, lanyards, clips not in use, etc.
If I get the cataloging done, Then I can get my wardrobe boxes full of flashlight boxes, put the light, spare parts & instructions all together and have the mother of all flashlight sales...