Saturday morning, Kittyboy went to put his foot on the table during breakfast, and I told him no. Then I leaned over to him and said very solemnly - That's one.
He looked at me a little askance, looked down at his foot, and started to lift it again slowly. I told him no - and that's two.
He looked at me. He knew three came next. But what was up with counting right off the bat? And gee, Mommy sounded really serious. Did he want to find out what three was?
Apparently not, because he didn't do it again! (And three was going to be moving his chair back from the table).
It's a "duh!!" but when the counting starts the first time, rather than when the kid makes it apparent he's not going to do it unless you DO count, you get his attention a lot faster.
Massive improvement over "No feet on the table." "No feet on the table!" "Get your foot off the table!...1...2..." and he pulls it off right after two.