I found this 3″ pry bar at CountyComm and have carried it with me everywhere. It is dead simple, strong, and tremendously useful. I use it for everything from small prying jobs to opening the tape on boxes and getting that little bit of extra leverage you need sometimes.
At 3″ long it rides unnoticed on my keys until I need it, and it is always at the ready. County Comm has multiple versions in different lengths, and some lighter more expensive versions that are made out of titanium, but this 3″ model suits me perfectly. It’s surprising how much utility one can find in such a simple piece of metal.