For quite some time now I have practiced giving thanks for five things in my life. I do this every morning and every evening. Often in the evening, just before I fall asleep, I recall synchronicities that may have happened during the day, small miracles that draw me back to a state of awareness, of being in the present moment.
This being said, there is another aspect of gratitude that really works for me. If I find myself with negative or angry or unproductive thoughts and feelings, as soon as I become aware of them, (I become the Observer), I cut those thoughts at the base, as it were, by once again giving thanks for five wonderful things in my life.
Because I am used to naming what I am grateful for, this is a sure way to change my negative state immediately. One cannot be angry or frustrated or upset and be truly grateful at the same time.
Gratitude is a powerful tool.