Everything in our world is a gift. Gratitude for the things we have end experience is our way of demonstrating Love to the Creator for these gifts. It’s not just gratitude for the big things. We've been asked to be grateful for the little things in our lives, and to show our gratitude to others for what they bring to our lives.
More details, including my thoughts and some additional exercises on feeling your gratitude, are in the book: Awakenings from the Light.