Having had one of my early morning ah-ha moments it came to me that there is nothing that is not part of my personal learning environment. Whatever is my current topic of interest I will often find something relevant to my learning about it in such obscure places as romance novels, something in a tv show, a seemly unrelated comment by a friend or the ideas I am considering go into that void called my subconscious where something happens to that learning and a day or so later or 3am in the morning it will all come together - perhaps the neurons have had time to run a few programs and reconnect in different ways.
Learning starts when there is something on your mind. I've called it in my diagram a topic or interest but it can be anything, positive or negative that requires new thinking, problem solving, new skills or just a new approach.
The most obvious place to find learning is those things that directly relate to the topic but we do not exist in isolation from everything else going on around us.
For me, I learn something quickest once I can bring it into the mainstream of my life and start making wider connections.