If your fishing rivers, and there are some feeding fish on the surface, look for small rises, use a dry fly, or an semi emerger, like a Klinkhammer etc, or use some nymphs, something like a gold head hares ear or pheasant tail nymph, but these would be for fish that are sub surface feeding, feeding below the surface. Every river would have to be observed to see what fly activity there is and where the fish are feeding, sub or surface. If your fishing put and takes, use lures, cats whisker, orange yellow black and green mix coloured lures usually take stockies. Its a big learning curve, good