I like small Baits(egg clusters) or tarnished copper or brass spinners or Flat black spinners.
Find deeper water under ledges and fish faster riffles as the fish will be using these for cover.
Cover plenty of water and enjoy the scenery,Sunny days are great days even when the fish are not willing to bite so spend sometime just soaking the whole experience in.........

My comments are targeted more towards summer run fishing. Winter run fishing I do not think it matters since the rivers are higher and probably colder so a sunny day may just help get the fish to bite. Some flash is what it takes when the rivers are cold.