The way a snook's, and other top apex predators, eyes are positioned always has them looking up. Pay attention to where they are positioned in the water column and present your baits or lures accordingly.
If the snook are laid up in a shadow line a foot or two below the surface, try to keep the baits floating right over their heads. If they are stuck tight to the bottom; try to get the bait down just above them. Try to keep the baits moving just over their heads for the best luck.