I think there are items that have a good size/weight to utility if you do end up needing them in a place where you can't just run to a store. But you also need to be careful not to fall into a "just one more thing" trap because it occurs to you something might be useful or even was useful in a very specific set of circumstances.
“I’m going to be on a plane for 14 hours,”
“I need to get ready for bed at night,”
“I am going to walk through the city”
or “I am doing a wilderness hike.”
I only say that because everyone’s checklist is very different and I think it can be too easy to overpack.