It seems simplistic, but remembering to say "thank you" can turn your day, your month, or even your year around. It's true (science says so). There's only so much you can control in this world, but counting your blessings has been proven to make a positive difference.
According to a 2003 study in the Journal of Personality and Social Psychology, not only can gratitude make you feel better by reducing toxic emotions, but it can also influence how you take care of your health. In the study, three groups of participants were assigned to keep a journal. One group was instructed to list five things they were grateful for in the past week, another group recorded neutral events, and the last group documented five daily hassles that got in the way of their day. The grateful people in the study reported feeling more optimistic and better about their lives overall, in addition to exercising more and experiencing fewer physical ailments.