In college one of my classmates who was also a Unitarian Universalist had a very simple practice of giving thanks for the food he ate. Before each meal he would pause briefly and silently mouth the words "Thank you."
Recently, a family in our church shared the family grace they say before meals. The words are adapted from Ralph Waldo Emerson:
"For each new morning with its light.
For rest and shelter of the night.
For health and food.
For love and friends.
For everything that goodness sends."
Practice: On Thursday, 2/7 express gratitude for the food that you eat. You can do this as simply as mouthing "thank you" or by finding a reading that expresses gratitude.
If you have a particular table grace that you say, feel free to list it in the comment section below.