Ask HN: How do you personally learn?

My short list of the skills that have helped me the most in my career as a software engineer is not sorted. But the ability to quickly learn things is easily on that list. With technology constantly and rapidly changing, small improvements in the speed at which I learn things can have a big and cumulative impact on my productivity. But we rarely discuss personal learning strategies. What are your personal strategies? Please consider mentioning even what you consider to be dead obvious. It might not be to others.