78-year-old who has written over 175 books: My 4 'hard rules' for keeping my brain sharp and quick
- Posted on July 11, 2025
- By CNBC
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78-year-old who has written over 175 books: My 4 'hard rules' for keeping my brain sharp and quick
"Even though I'm 78 years old, my mind is still as productive as it ever was," writes Anthony Fredericks. Here's his No. 1 secret to staying smart, mentally sharp, and curious.
