When blood-sugar falls, so does serotonin, and you'll be left feeling worse than you did before. Instead, take a few deep breaths when you feel angry. Collect your thoughts and try to articulate them in a calm, coherent manner. These feelings often make us seek solace in the cookie jar. The reason comes down, again, to serotonin.
Numerous studies indicate that exercise decreases mild depression as effectively as psychotherapy.
A Duke University study said just 14 minutes of walking reduced negative feelings by 82 percent. Fit in at least 30 minutes of push-ups, crunches or weight lifting, three or four times a week, plus up to 30 minutes a day of aerobic exercise, like walking or biking. If you think you're suffering from clinical depression, consult your doctor.