One of the most important methods for catching more catfish is to identify what depth they are travelling at.  A common approach is to set three lines - one at 10 feet, one at 10-20 feet, and one at 20-30 feet. When you start geting bites on one depth then move all of your lines to that depth. You will be surprised at how many more catfish you will get if you can narrow down on the depth early. The difference between catching catfish and not might only be a few feet.