2. Negative Thinking
If you refer to a half glass of water as half empty, chances are you're a negative thinker. According to UK researchers, this may be a cause or a symptom of depression. They add that depression and negative thinking can combine to form a vicious cycle. How do you stop it? The Mayo Clinic suggests evaluating what aspects of your life are creating the negativity, hanging out with a positive and friendly crowd, making an effort to see the lighter side of life, exercising no less than three times per week, and thinking positive thoughts.