18. First building should always be a temple and as soon as you possibly can, build the Temple of Artemis. A variant on this is to build granaries first and then completing the Pyramids or to build barracks and then Sun Tzu's.
19. What's the point of waiting 50-odd turns to make sure you get Sun Tzu's? Use a GSL as soon as you get them! The Mausoleum looks soo nice when you go to city view so why deny yourself the pleasure of looking at it each of those 50-odd turns!
20. Always adhere to OCP - even if it means not placing towns next to fresh water/rivers or placing them next to volcanoes!
21. Declare war with the forces you have in hand! Then start building replacements and send to the front as soon as they're built.
22. You can never have too many slaves! If you spot an AI worker or settler, abandon the attack on Seattle/Veii/Omdurman and capture the worker/settler!