Find your centre and feel the steadiness of the ground.
Stand with your feet shoulder-width apart, or sit with your feet on the floor.
Feel gravity: let your weight drop into your feet or the seat. Feel your weight being held by the seat or the ground.
Bring all your attention to the contact of your feet with the ground.
Feel the steadiness the floor gives you.
With each exhale, let the body relax downwards.
Stay in this steadiness, breathing freely.