"The most important technique in trolling is to keep your lines in the water." When they aren't, all the other techniques are worthless.

 In the winter, when the water is cold, you will need to fish slower. Use somewhat noisy bait and have patience. You will need to cast to the same spot numerous times. The reason is that in cold water the metabolism of
bass is slower. The lure almost has to hit them in the face in order to get them to hit it.