Fish them under a float with a couple shot, just like a scud. Best color depends on water clarity, level, and available light. Worms are a great pattern when they generate, or anywhere when it rains enough to saturate the ground. You would be amazed at the numbers of worms that drown in my 16x32' in-ground when we get a heavy rain. Imagine the numbers that get washed off the shorelines. You can tie them on anything, also look up the megaworm & mop fly. No skill required other than winding thread clockwise and tying a half hitch or three.