If we're talking about something like the Doug Ritter PSP, then I voted as I would use it, only in a serious situation. Serious is well on its way to becoming an emergency.

On the other hand, if we're talking more along the lines of, say, a Personal Convenience Pak, that would be something you build to suit your own daily/emergency needs. You stuff these items into briefcase, knapsack, shoulder bag, or whatever. Then I'd have to change my vote to "anytime I need something."

It depends on whether you carry a kit or pack strictly for physical survival, emergencies, or for everyday convenience. Or all of the above.

-- Craig