In many of Kelly Galloup's videos he preaches proper tension when applying materials to a hook, and using effective thread techniques when securing them. Applying half-hitches when tying off materials helps prevent them from coming loose before you tie on the next material. A good thread base is also helpful when tying patterns like the Woolly Bugger. Wrapping hackle forward with the thread (like a wire wrap) also helps secure it from coming loose. I often apply a little head cement (or superglue) to lead wrap to keep it from spinning on the hook or coming loose as other materials are applied.

Here's a short video from Kelly on tension control and setting the thread during a tie:



One thing I've learned from watching really skilled fly tiers is the control they have with their fingers when they place materials. There are some tricks to learn, but mostly I feel that control comes with practice and experience. This is something I've struggled with now for years. Especially when stacking deer hair.

Controlling the materials, placing them properly and applying the thread effectively are the most important traits of a good fly tier.


Good luck!
-Bill