Productive people realize learning is learning. There's really no inefficient learning if you're actually learning because even if you're not going to use the thing you're learning, you simply become better at learning new skills. This is a lifelong process a it makes you more productive. B. It makes you more interesting. See, it makes life more enjoyable.

D. I'm not a scientist here, folks, but there is some evidence to suggest will actually make you live longer.