I am more than grateful; I am thankful.
If you want to be more happy and successful in your life, then I suggest that you ditch the word grateful from your vocabulary and use the word thankful instead from now on. Why, you might ask?
Well, let me explain:
If you use the word grateful, you make yourself powerless whereas if you use thankful, you make yourself powerful. Whatever happens in life, you need to understand that the ultimate freedom you have as a human being is that you can always choose how you respond to external events. This is the ultimate gift we have as human beings.