How To Organize A Fly Box

Unknown
box 1 - nymphs, he had 2 or 3 of his favorite patterns in a variety of sizes. He only uses a couple of patterns that are generic, like copper johns, hares ear nymphs, that sort
Box 2 - dry flies. again, using only a couple of patterns that are productive to your area.
Box 3 - streamers
Box 4 - bass/pike flies
box 5 - specific to your trip. do some research ahead of time and find out what is working and tie up some of them.

Keith Weeks
BASS
- Streamer box (2-12)
- Popper box (8)

TROUT
- Mayfly box
- Caddis box
- Streamer box (2-12)

Greg Herring
BASS
- Nymphs (6-14) & Wooly Buggers (2-12)
- Bugs (2-4) & Streamers (2-12)

TROUT
- Caddis & Mayfly Nymphs (10-16)
- Wet Flies (rising and drowning) (6-14)
- Small streamers
- Dry flies (caddis and mayflies): based on hatch (10-18)

STEELHEAD (2 or 4-8)

William Gerrard
I simply organize them by the species I'm targeting -- flies for brown trout in streams, for rainbows in ponds, for smallmouth bass, for pike, and for brook trout in lakes. A couple of boxes overlap more than one species, but generally it works well.