The easiest way to add a second fly in a tandem rig is to attach the dropper line directly to the hook of the top fly. However, some anglers struggle a bit because the knot slips off the hook or materials get in the way. Here’s a great tip from Doug Garvey of Anglers All in Littleton, Colorado. Not only does Doug’s method make it easier to tie on a dropper line, but it makes the process quicker, as well. And that means you’re back to fishing faster.