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push-ups maybe.
back up your braking points, drag them out in length.
learn to always double-down your feet at stops.
the smoother you are when taking off, the less wiggle/wobble others will see from behind.
smooth shifts help eliminate helmet-banging with your passenger.
a friendly, encouraging pat on the thigh on occasion is not uncalled for. (you to her, not the other way around....but then again...)

work out the hand signals for hungry and potty breaks. a hand signal for "slow down or i shall pummel you at first chance" is also good.

don't tell them the trick of putting their hands over your helmet's eyeport to get you to slow down.
it's a secret.

bags of cement and buckets of water....um....not a particularly good idea.

as always, adjust suspension and tire pressures, lower the speed, be smooth, it's her ride, not yours.
almost forgot: no wheelies, stoppies or tattoos. 'least on the first ride. after that...