On a shelf in the shop was a little book that was propped open. It was Leisenring and Hidy's The Art of Tying The Wet-Fly and Fishing The Flymph. Inside, I found a treasure of patterns and some fishing instructions and I suddenly switched gears and began fishing these great little flies.
If you really want to master the art tying flies, and make your flies look “just like the ones in the fly shop,” then try applying these simple tips for consistent proportions. The trout might not appreciate it, but you will.