Even here in Ireland where the sun is not necessarily that strong I dread having to play against the sun. However I purchased a pair of Adidas galeforce sunglasses. They are designed for skiing but they are small and tight to fit around your head. They don't interfere with your sight either. You can also get a wide range of different lenses for them to.
Some people say that the different lenses really help to focus on the ball.
They also stop sweat and sand getting into your eyes. Since I have bought these goggles I have not had to dread playing into the sun. Like Trevor Lambert I prefer to set up offset left, standing on tip-toe with arms raised above shoulder height while the taker sets up, gently banging the crossbar with my stick, before crouching into a ready position. Throughout this, I like to try to stare out the taker, looking for a clue as to where he is going to put the ball. My best tip is for penalty flicks - saving them.