I have had two hiking boots, on the same person, separate on their first hike. Duct tape on the first one, paracord on the second one.

I also duct taped my future wife's dance shoe back together on our first date.

Duct tape, key chain tool, pocket sewing kit, and a flashlight will cover most urban issues.
If anybody knows of travel size packages of WD-40....
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane