In this episode, Dr. Huberman describes how to access focused learning bouts, creative states, and the underlying neural circuitry involved. He frames this in the context of our daily 24-hour cycle in order to make it practical, clear and precise about timing. He reviews the role of fasting, meal timing and specific types of nutrients for promoting certain states of mind. Dr. Huberman also reviews various other tools and biological factors that directly or indirectly gate brain function and that we can control. He answers commonly asked questions about the science of psychedelics, binaural beats, and visualization.