Putt with your palms facing eachother

That means there is no manipulation required in order to return the putter squarely to the back of the ball, similar to clapping your hands. The palms naturally return to face each other; you don’t have to think about it.

If the palms aren’t facing at address, they tend to work independently, so one hand becomes more dominant than the other. That’s not good news, because it tends to throw the putter off its natural swinging arc.