On small waters it is key to look for every single holding water between every single boulder and run of white water. It's simple, fish, like most creatures, are looking for the easiest, safest place to live. Calm water is the honey hole for fish, it takes less energy to fight the current and calm water tends to run deeper, giving fish a better opportunity to get away from predators. Now, the idea of calm water is relative, a slow meandering bend in a large river is definitely more calm than a two foot pool between two runs of white water. But the principle is the same, fish are going to be where it is easier to survive, i.e. eat and stay safe.
The key is to look at the water and see every piece of holding water. It may literally be a small piece of calm water that breaks between two pieces of white water. If you're lucky you may get a deep plunge pool that runs deep and long. You'll find both on small waters, but if you skip the small holding water and fish only the deep or long runs you will miss out on a lot of fishing opportunities. As always, Good Luck and Guid Luck!