Originally Posted by Andy M.
And do you have your bedside alarm clock set 20 minutes fast so you can do some quick mental subtraction every morning.
Actually, one of my watches is 15 minutes fast. Another is automatically set by the Atomic Clock at 2 AM every morning. My bedroom clock is about 20-30 minutes fast (unsure exactly) and is turned so that I can't see the display from the bed. I do the mental math on the watch, though, when the alarm goes off, since it's the way I tell time when I'm in bed. All of my cars (I have 4) have different times set on the clocks, and the microwave and oven in the kitchen each have different times.
I also count stairs, as well as add phone numbers together (pretty much subconciously, since I don't realize I'm doing it until I'm well into it) to try and find some sort of continuity/pattern. For example, we'll use 555-1252. I can get 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and on from there by adding different combinations of numbers from the phone number. That shows a continuity in the numbers that to me is pretty gratifying mentally.