As I'm in Scientific Experimenting Mode, and as I arrived home not particularly hungry this evening, I had what I usually have for breakfast, with the amount of insulin I'd usually take with it. Which has been most interesting and informative.
In the mornings, from a nice in-range number, I can eat that meal, walk 7000 steps to work, do a full active morning, usually adding another 5000 steps to the total, and be a nice in-range number at lunchtime.
This evening, I was a nice in-range number before I ate, taught two piano lessons, answered several e-mails, did a load of laundry, got it out off the machine, felt odd, tested, and am currently coaxing my numbers back up before attempting to hang the laundry up! All having added about 500 steps to the days total!
Good job I didn't want to go for another walk this evening, really.