Thanks all for your responses, they were very helpful and instructive. Yes Bill, I have already printed that guide out, and am about half way through reading it. It is excellent.
I have a question on Tech development.
It is random I know, at least to the extent that once you put you money in, you may or may not get a reward. However, my question is, playing either side I guess, is it better to pump money in early, and sacrifice military build up, or build the military first then pump into the tech.
To date, I have played as the Axis, and find I end up getting killed by jet aircraft, way ahead of schedule (1942), and cannot match the development. This is odd of course, because as I recall, the Allies did have a jet aircraft as early as 1937, but didn't develop any military units until after the war, whereas the Germans fought combat missions with the ME262 in 1943/4.
Again, any advice would be well received.