To secure it's tournament victory against the Michigan Petanque Club, we used the Pointing Trainer Tool.
The carcass is made out of wood, spaced either 2 1/2 boules or 1 1/2 boules wide - with removeable nails to help keep the tool from shifting on the dirt.
You draw a circle from various distances to the P.T.T. and you can even add a cochon to aim for.
I suggest you create one for your own pointing improvement!