Chuck them into pencil reeds, lilypads,rock piles,wood, anywhere you think fish may be. I find them effective in the morning and in early evening for bass.Kinda wakes em up
Pike will hit them all day long. I like to run a stinger hook(a second hook attached to the main hook) because sometimes fish like to punch it, rather than try to eat it.
Colors.....white, white/chart, white/green for bass. red, red/black, red/white, white ,pink for pike.
Willow leaf need to be retrieved faster than colorado blades, to get them to turn, so slow retrieve for Coloradoa, fast retrieve for willow.Also Colorado blades provide more lift than willowleaf blades, so for deeper fish, willowleaf blades are generally a better choice.
Blade color use the same formula you would use for a spoon or lure, depending on light and water clarity.
Good luck...............I have become a spinnerbait junkie this year Absolutely wont go fishing without a few in my tackle bag.