My 88-year-old grandma hasn't slowed down at all. She credits her vibrant life to 4 key habits and 1 quirky rule.

I've learned a lot of great life tips from my 88-year-old grandma. Alison Van Glad My 88-year-old grandmother credits her energy and independence to a few simple habits. She always has a nutritious breakfast, stays busy, and nurtures her relationships. She also has one quirky rule: always drive separately when meeting friends. At 88, my Grandma Elsa hasn't slowed down one bit. Every Sunday, she takes the three-hour trip from the Catskill Mountains to New York City with my uncle to work at the…