Most tying problems stem from two things:
Failure to properly plan the fly, and not knowing how to work with deer hair.
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Tying the Muddler Minnow. Source: InTheRiffle.com
How to spin deer hair
First designed to imitate a small bottom-dwelling fish, Muddler Minnows are now tied as general attractor patterns and to imitate anything from caddis flies to grasshoppers.