Great question!
For me it depends on what I'm doing in the studio in general. I have a lot of equipment and I write with modular gear based on if it fits with the composition or not. That said, I have a fairly good sized set of racks (check my racks, they're all public) and I find that sometimes I'll leave a patch I really like wired up for a long time (never for months). If I need to move on, I snap photos of the patch, and make a video recording so I know what it was about the sound that I liked. It's also a good way to see the patch wiring, the knob positions and so on. That way if I want to attempt to recreate it alter, it's way easier.
I'm actually trying to get to a position where I can have the minimal number of modules that have the greatest versatility. I have somewhere around 100+ modules so it gets a bit frustrating knowing that I have any handful of modules that will accomplish the same things. I like making music way more than I like fiddling around with my rack setups and wiring!
"I'll just plug this in here and see what happens."