A:
If you look on youtube you will find everything you need to know about a drop shot setup.
The easiest way is to measure out the length of left over you want as a trailer for the drop shot weight. Make a palomar knot with the hook. Run the extra back through the eye of the hook one more time and then cinch your drop shot weight on any where from 8 - 15 inches down from the hook.
It is typically best to hook the worm or minnow very close to the head of the bait to allow it the best action. Just run the hook straight through the top of the head.
Fishing the drop shot rig is easy. Just remember to not twitch it as you move it, and once you have it in place keep the line tight and twitch it for about 5 seconds before moving it again...always keep a tight line, unless in areas where you can sight fish and can allow the weight to drop to the bottom and then pull it back up again.