Now I'm writing about contemporary Los Angeles from memory. My process was to hang out, observe, research what I was writing about, and almost immediately go back to my office and write those sections. So it was a very close transfer between observation and writing.
Sometimes acting, particularly in film, can feel so contained. You need to be small and not overplay things, so it's such a relief to be able to go as far as you can go with an emotion or a feeling or a speech.