I spend a lot more time out making observations (and I’m out making observations quite a bit the rest of the year, too). I try to make observations of organisms like ants and slugs that I don’t usually photograph the rest of the year (but I didn’t get either an ant or a slug during the CNC). I make Casual observations of organisms like birds, when I don’t bother with Casual observations the rest of the year.
I spend even more time IDing than at other times. I try to ID my local Unknowns during the CNC ID period. If I know something is captive or cultivated, I mark it so during the CNC, but also at other times. I will leave messages, especially for newer observers, when they have several photos in an observation, each of a different organism. I don’t usually leave messages about captive/cultivated; I just mark them so. I often work most of the time on the easy-to-ID and very common species in terms of IDing for the CNC, just to move all the Red Trilliums/Eastern Skunk Cabbages/Dwarf Ginsengs/Yellow Trout Lilies/etc., etc. out of the way for other identifiers.
My house always has dusty corners and, luckily, I don’t live in a CNC area, so I don’t have to photograph all those spindly spiders in my basement. ;-)