Since I might forget my head if not attached I keep lists in a 3 ring binder, that way it’s easy to change things around, which after trial and error or seeing a better idea, I frequently do. I find a printed hard copy list just easier as it can go out to the garage, shed, horse trailer etc with me when I'm packing up. Most of my gear is stored either in bags or plastic bins and I usually keep a list of what in them attached to the bin or bag, much easier than rummaging around in a duffle, stuff sack or bin to see what I put there often months back.

I also keep a journal and jot either good ideas I see on the net or in person down, as well as supplies---that get used and need to be replenished, cleaned or repaired. The repaired category would be more for horse or dog gear that the saddle shop can fix or re-size as sewing a button on presents a challenge for me!