rgmwa,
Like with driving, I do en-route calculations.
Check fule used to flight plan, fuel burn rate, check for cross winds, and try to calculate them.
I don't care if the answer is right or wrong, I just try to go through the montions of from which direction it is blowning and how strong it is.
Aalas the back of the thighs sufferes a lot and so I take my feet off the pedals fora while.
Drink a bit of water at regular intervals.
Listen to the radio and keep a picture of where the planes are, and what they are doing.