The Nine Principles of Brainergy Your Brain Set For Optimal Cognitive Aging Be A Lifelong Learner. It's Never Too Late. Begin Now. Reach For Enriched Environments. Build a Better Rat Cage. Active Thought Takes Effort, and that Stimulates Nerve Cell Growth. Improve Physical Health with Regular Exercise and a Brain Healthy Diet. Network With Other Brains. You Need the Input. Don't Withdraw. Exercise Independence. Make Your Own Choices. Refuse Ruts. Practice Flexibility. Rigid, Stiff Minds are Dull. Generate Goals. You are Your Brain's Best Friend. Do Things Meaningful to You and Fun.