Here’s Justin Rose’s take on his preshot routine.
One thing I particularly like is his use of his club as a plumb bob. It really does help you pick a spot that is directly in line with the ball and your target point.
At about 24s into the video Justin talks of closing his left eye to get alignment from ball to target. Which eye you should close depends on which of your eyes is dominant. If you don’t know click this link to see our simple routine for checking which eye is dominant.
Notice that Justin talks of trusting his swing as he steps up to hit the ball. It is a crucial element of consistent ball striking.