GW,
I don't know if you do much driving, but one of the best ways of practising is when on motorways to continually update your ETA for any point. In these days of on-board trip computers etc, a little bit of mental maths can make the journey fly by. Also, if you have a range/consumption facility, you can do a "howgozit" on the fuel as well.
Knowing that BEagle has a sleek Mercedes, I am sure he continually checks the readings from the ghost in the machine with his own in-built cpu to make sure they co-relate and that way every trip you make can sharpen your mental skills. It can also impress the odd female passenger when you tell her, upon leaving pub/disco/wine-bar, that she'll be home at 11:23 precisely, and you are always right! Judicious use of the go/stop pedals mean that you deliver her to her place spot on time.
