I would like to suggest an exercise for a day when you feel adventurous enough to try this out. For an entire day, respond to anyone who asks you how you are, "I am full of gratitude today."
You might even say, "I am full of gratitude today," to someone who didn't ask you how you are.
The first thought that goes through someone's mind is usually, "What happened special today?"
This gives you an opportunity to think about what happened special today. Each and every day there is always something special to be grateful for. The one factor that is always there is the fact that this day you are alive. By virtue of being alive today, today is special and you are entitled to be full of gratitude today.
(From Rabbi Zelig Pliskin's book: THANK YOU! Gratitude: Formulas, Stories, and Insights: Artscroll Publishers)