(Not only for Thanksgiving Day, this is every day.)
Here is the list:
My parents have raised me to be always respectful (and have manners as well).
For example, the restaurant server placed the bill on the table. My close friend's cousin insisted to pay the whole bill for us. I offered to pay my share. Thus, I loudly said, "I feel ashamed."
Yes, I know who ungrateful people are. What matters is to focus only on myself.
Why be grateful?
Because gratitude acknowledges goodness in my life.