Black holes spin in the same direction as the matter that created them.
Most matter is spinning in some way. It could be travelling around the star that is collapsing into a black hole, or it could be spinning around the centre of the galaxy. Typically the matter is spinning the same way as the hole, in which case, as the matter falls in, it speeds up the rotation of the hole. If the infalling matter is moving opposite to the hole's spin, it will slow down the rotation of the hole.
As for clockwise or counter-clockwise, there is no difference between the two. If a black hole spins clockwise when seen from "above", then it will (simultaneously) spin counter-clockwise when seen from "below".