I once sat in on a TV production class, early in the schoolyear before my schedule got sorted out and it turned out I couldn't take it. So I was in it for one day.
But the teacher had the incoming students do a very simple exercise: He turned on some broadcast TV, and told us all to bang our fists on our desks every time there was a scene cut.
Then he changed the channel a few times. Soap opera. Newscast. PBS. Cartoons. Movie. Commercial break.
Our hands were sore by the end of it, but it stuck with me -- every time I watch older or foreign cinema, I am cognizant of how much longer the shots are.