Play 11.
Set out 9 cards, 3 x 3 is normal. Now you have to make 11 using only two cards, so 2-9, 8-3 etc or three picture cards (I was originally taught it had to be Jack, Queen and King but tweaked it) and then put new cards on top of the 11's you made. Aim is to go through the whole pack. If you've done it right then the remaining 9 cards will go together.