IMHO, short finals or lining-up for departure are places to be looking out the window and concentrating on handling the aeroplane. Am I in a minority of one who feels that these impromptu self-created extra checks just get in the way?
I totally agree it is a bad idea to get distracted and start some kind of paranoid ad-hoc scan at a critical moment. All the killer items are part off the checklists, but checklists can fail to get done. I use two simple triggers. If the chart clip is flat against the control wheel the before takeoff checklist hasn't been completed. It takes but a nanosecond on receipt of a line up clearance. The second is at 1,000 RA, "CCG", Checks complete, Cleared to land, G/A altitude set. Works for any approach.