Could also get a C&F DESIGN fly box with threaders. You load the threaders with flies then when needed. Slip the thread through the threader and pull the fly off. Line now through the eye of the fly.

This isn't the cheapest option and I have not used them but seems to me to be a wonderful design for those of us that can no longer see a fine tippet and 20 size or smaller eyes all that well without magnification.

Easiest knot That I know of is Davy's Knot. link below

http://www.fieldandstream.com/fields...666_10,00.html