what one...

[Sonny Edmonds]

For me, it is to tye the next fly better than the last. And to keep at it until I am satisfied with the results.
Perfection is a fools game. Success lies in doing your best, and quitting when you don't feel you are doing your best.
I get tired and quit for a while. Then a little later find myself trying again.
Something that has helped me a lot is #28 hooks, and 14/0 thread. Takes patience, and I love the challenge. It's just me and the materials. (And my mageyes...)
Can I do it? Well, I keep trying.
Besides, it's easy on my wore out back. Which is nobodies fault but my own.
But it's been fun getting here.
So one thing?
Perseverance.

[kglissmeyer]

For me it's the technique of "paying attention". I think I've become successful as a fly tyer because I pay attention, not only to how I'm tying the fly - proportions, materials, etc. - but I pay attention to other tyers and try to learn something new that may help me become better with my own tying.
Oh, yea, don't crowd the head!

Kelly.