Flare-Idle:
Thank you very much for posting the above information about the UK CAA publication. I am just finishing up a major AFM revision for a Canadian built aircraft, and I was not aware of that CAA publication. I've had a look at it, and it contains some good points.
Some other documents that relate to checklist design (perhaps more to AFM design than specifically to checklists) are:
GAMA Specification 1 for POH
FAA AC 25-1581-1, Aircraft Flight Manual
I'm having a difficult time deciding whether to use colour in the AFM or not. There are some advantages, and there are disadvantages. Now that colour printing is becoming more common (and certainly less expensive than it once was), it would be nice to see some guidance material that specifically addresses how to take advantage of the benefits of using colour without also encountering the problems that can arise.