All the above idea ideas are excellent, but there are some very old tips to remember.
Just one, do not forget wax, in the last few years people have begun to catch on to
using it to alter the colour of tying threads. There are other reasons to use it, it helps
the tying thread to grip materials with few turns, and reduces the bulk on the hook.
Even the so-called waxed threads need some, use it often and sparingly.
I admit I do not mix my own, I use BT's excellent product.

I know a lot of the experienced fly-dressers reading this already know, but hopefully
there are some beginners reading it.