In other words, the more fish you see in the water, the easier it will become to pick them up. I believe the main reason guides spot fish before their clients is because they know what color to look for on a given flat. Of course, knowing where the fish tend to hang gives us a huge advantage, too. The best anglers keep their eyes moving and cover as much water around the boat as possible. It's never a bad idea to take a peek over your shoulder occasionally, fish have a nasty little habit of creeping up in your blind spots.
Concentration is another key ingredient.
The moment you start daydreaming is when the fish bump into the side of the boat. I'm often asked how far from the boat I concentrate my search. This varies with conditions - on a sunny day it may be one hundred yards, while on a cloudy day, only a boat length or two. Poor visibility makes the most demands on both the angler and the guide. Short, quick casts are the norm, you just won't have the time for anything else.