As little as needed...
“Do as little as necessary, not as much as possible?” That’s a quote from Henrik Kraaijihof, a renowned trainer and coach of elite athletes. Train enough to stimulate the desired response but not so much that it overtaxes or injures the body.
As little as necessary or as much as possible. Those choices are available in many activities other than athletics. Organizational development is a good example. Change only enough to reach the desired improvement. Anything beyond that puts the system at risk.
What other examples can you think of where ‘as little as needed, not as much as possible’ is sound advice?