How do you find out where to point a satellite dish?

Commercial satellites are in geosynchronous orbit around the equator. They are each at a particular longitude. The direction you need to point your dish then depends on where you are. In northern Canada, dishes point at a very shallow angle to the south. In California, they are pointing around 45 degrees up and some amount east or west.

Find out the longitude of the satellite you want and then look up on the satellite company's website (or do an internet search) for the angles to aim (one angle is skyward, the other north/south/east/west).