Make initial casts count. The longer you spend working an area, the less chance of attracting the vermiculated czar of the pool. Any fish grows suspicious after watching a few comrades get hoisted out of the water. Big specks close their mouths and roll their eyes at the repeated casts of hovering anglers. Once hits dry up, move on to a fresh area.
Presentation is crucial.
Putting an offering in front of trout in a graceful, natural manner means utilizing all variables to advantage. Where to cast, retrieval speed, and lure weight to use depend on water depth, current speed, and where trout are holding. Current is a trout stream's dominant force. Understanding its effect on a bait or lure is the backbone of effective presentation. Use the current as a delivery vehicle by casting upstream and across.