First thing... take the barb off ;-)
Second, try to visualize the fly before you tie it and plan out how you are going to do it step by step. Just like we say when describing a fly it is a "recipe". Take out all your materials you need, and know when you are going to do what step and how. Also, like in your wings/legs on your teenie nymph, measure them out before you tie them in. I recently started doing this on my flies and they are much more visually appealing to me. That doesn't necessarily matter to fish, but to us FF snobs, it does. My biggest piece of advice is to just sit at the bench and tie the SAME fly about a dozen times. Make it something simple like a Hares Ear. You'll improve with each one and see what works and what doesn't. Have fun and keep posting pictures, we'll help ya out.
Ryan