Billionaire Kumar Mangalam Birla's wife and mental health advocate Neerja Birla called the '8-8-8' rule for work-life balance "utopian concept" and "next to impossible" to practice. The '8-8-8' rule involves dividing the day into 3 parts: 8 hours for work, 8 hours for sleep, and 8 hours for leisure. "We need to work on having harmony in life," she added.