Any Top Tips for riding pillion on a hard and fast powerful road...
 

...bike? From a new -to -the -thrills -of- motorcyle- riding fanatic.

Act like part of the bike so as not to throw off the balance around corners - hence pillion back rests, grab handles etc. Depending on the rider they may prefer you to hang onto them so they don't have to second guess where your weight's going. Ask just to be safe.