I asked my four ex-pur-ts and here are their suggestions:
Leonardo: CATNIP and a good brush
Luke: CATNIP and TUNA
Chester: CATNIP and lots of the balls with the bells in them
Grandma: CATNIP and Pounce tuna treats

All of them agree on: lots of time for cuddles, snuggles and scratching itchy ears and chins!!!

I suggest a cat meow dictionary, lots of love, and TONS of patience!