Pink Sparkle Worm
This fly is such an easy tie, and super effective in all seasons. I've caught trout and salmon on this fly in almost every month of the year (I don't fish much January-March). I generally use this fly as the lead fly in a nymph rig, but in shallower water in the summer I'll use a foam dry fly and drop this underneath. Worms are an effective pattern in high water or are a good rain, and this fly is no exception.
As far as tying this pattern, I like to use an emerger hook and an oversized gold bead. It doesn't matter if this bead goes right over the hook eye because you're going to secure it in the middle of the hook shank. Once you have the bead secure in the middle you just tie back to the hook bend and put on a 3 inch section of pink pearl core braid. Tie it in like you would a normal San Juan Worm at this point, and whip finish behind the hook eye. These are an easy tie, and a pattern that you want to have in your box!
Hook: Size 14 emerger hook
Thread: Pink or Red UTC 70
Bead: Size 3/32" gold bead (good for size 14 in this case)
Body: Micro Pink Pearl Core Braid (from Dubbin)