Most of the pictures I take with my phone are reminders of something, or prices, serial numbers, phone #s on signs, etc etc.
When I do my group lunch deliveries, sometimes I'll send pictures of a part of a building, like the entrance to use, or a point of interest important to finding the place and send it to the company. They'll add it to the company profile for others to see.
I've found it helpful when others do that.
I really use the camera on the phone a lot more like a tool.
Oh. The first time I took a picture as a reminder was when I needed to know where my car was parked in one of those enormous parking lots. I did after I once couldn't find my car, and someone passing by gave me that hint.