I like to move around, and that is why I'm acutely aware of the importance of the sine qua non of my locomotion: my feet. I have difficult feet: very difficult feet. Between the broadness inherited from my dad, and the bunions inherited from my mom, finding a pair of shoes that fit is a major triumph. If the shoes don't fit well, my feet will tell me so, without much subtlety.
Perhaps that's why I'm also acutely aware of the sine qua non of my automotive conveyance: the wheels of my car. Your car can have the smoothest-running purring engine: you'll still get nowhere without a set of wheels that are in good shape. Hence my fixation with tire pressure, and keeping the rims circular.
On a recent fossil-hunting trip, when we drove into a few gravelly quarries, trudged our boots through clay-bottom streams, and brushed dirt off the fossils, we used that hoof pick constantly. I love a multi-purpose tool.