When I'm packing a camera bag for a photo trip, I work from a list that details all of the camera gear that I'm going to need. I’ve thought about which lenses to take, what filters I might need, I have spare memory cards and batteries, and I've planned out whatever lighting gear the day may call for.
This is how most photographers operate. We know ahead of time what we’ll need, so we plan accordingly. Sometimes, however, a few mundane objects get lost in the shuffle. There are many, many little things that we ought to take along — things that aren't necessarily related to the camera or lighting setup — that can make the day go much more smoothly.
To that end, here is my list of non-camera related things that may prove extremely helpful on your outings...