Lecture 14 of Outsmart Yourself: Brain-Based Strategies to a Better You (The Great Courses) examines the causes of depression and the actions that help diminish depression as fast as possible. Some tips are obvious like exercise but other tips like eating more fermented food is unconventional.
The main message here is that depression is like the common cold and we all catch it from time-to-time. These tips will help us grow out of depression quicker but the recommendation is to seek professional help if the symptoms of depression persist longer than expected.
Visual Summary of Lecture 14: Grow Your Brain Out of Depression