If I'm in a slump while paddling, I try to look for areas that the typical angler cannot reach or may overlook. The beauty of floating is the ease of mobility and how quickly you can check different types of areas. Extremes like very shallow, deep, fast or snag-laden are fun to ply.
Everyone fishes the textbook stuff.
Often times an area that doesn't "look good" just might hold an active, unpressured fish or two. Look for the overlooked.
On pressured waters, location and timing make all the difference. Try to get out on weekdays when there is less competition. If limited to weekends, go early and/or late. If you already go early, go earlier.
My summer river kit contains a Sammy, a Zara Spook, a buzzbait, a shallow-running crayfish crankbait and some 5" hula grubs and slider heads. I don't carry the kitchen sink and often times you'll find me with only one or two of the lures mentioned above.