During the start of the game, if you have good open space around you Granary on an oasis, you can build three or four Apple Orchards, two or three Dairy Farms, two Hops Farms, then build only three Wheat Farms ( around the Granary). After that, near the Granary where there is not an oasis space, build a Mill and two Bakeries. This will keep constant food production; it will not run out even when you have about a 90 population limit. Then, build one or two Breweries and one or two Inns. Also, build a Church. This will get the population happy to about +4. Wait until you have 100 popularity then raise the taxes to average taxes. Keep that at a constant rate and you will have tonsof gold flowing into your keep.