One of the best pieces of advice I've been given ...
"Walk as though you have feet and legs, not just a spine and a head."
Sounds obvious, however, I started noticing my feet and legs when I was walking down the street, and realised how little I would usually pay attention to them.
Notice your feet when you walk.
Notice your legs.
Pay attention to that that is holding you up and potentially ground yourself by observing what is grounding you.