flat learning curve

[gosling]

If I let myself get the nine to ten hours of sleep that I need (and let myself catch up on sleep if I haven't been getting that) I am happy and bouncy and full of energy (and WAY more productive.) If I don't, I am cranky and exhausted, often rather slow about the brain and far more likely to get sick.

The difference is often quite dramatic.

But I never seem to learn this.