I find that simply sitting and thinking while -- and after -- reading nonfiction (or fiction, if it's got good ideas) burns the facts and ideas in as well as anything. I don't think most people allow as much time for reflection and mind-wandering as they ought to; expecting yourself to remember fact after fact without taking time to really absorb, reflect, and expand on them doesn't seem realistic. It's not unlike a…
My process is not as involved. I take notes in a notebook while reading. Then I make blog posts out of them. This way I can review/consult any time, any where.
This really does slow down my process, though. I used to read several books in the time it now takes to read one. Writing blog posts is time consuming (and my notes are very rough).