This is a great list, I often wonder how people come up with such lists. Is it a long-term conscious effort to write down points like these as they come to you

This is a great list, I often wonder how people come up with such lists. Is it a long-term conscious effort to write down points like these as they come to you or do they sit for a few hours and these points come to their mind. I can't imagine being able to compile such a good list in a day.