The 1% improvement could be from our personal life, children studies, work life, health, mental health, habits, productivity, self care, investment, learning and application.... it could almost be anything.
I try to brainwash my children to approach life using this concept too.. because like how Plato put it : Never discourage anyone who continually make progress, no matter how slow'
So now instead of lamenting, I make effort to be thankful that me & my children are learning at least 1% everyday and grateful for having the opportunity to learn and grow.