I don't know about anybody else, but when I finished my OW class, I knew I was to "plan my dive and dive my plan." What I didn't have much idea about was what a dive plan was, and how you made one. Other than saying, "Let's swim out here and wander around and see what's down there," I didn't know what needed to be in a plan.
TSandM, as usual you started a very thought provoking discussion, that even experienced divers can benefit from. . . however you did leave out many important details, that other thoughtful divers have added. Before every dive in my local lake, I promise to take everyone's advice about their local conditions and add everything to the pre dive plan. . . my warm water diving partner starts losing interest about ice diving safety, when it's 100 degrees, and rapidly loosing ice in the drink cooler. But, as stated hear, you must plan for diving anywhere in the world before every local dive, even if the beginning diver in our group has close to 1,000 dives over about 10 years.
Really, your list should be copied for every beginning and intermediate diver, of course local information should be added. I added to my local pre dive planning to watch out for the Borg princess, she will assimilate us and make us dive in the cold northwest. . . and my dive partner has never watched Star Trek, or doesn't surf the internet. . . The dive partners we have to put up with. . . I'd drop him in an instant, bet he brings up such good tasting fish.