When you first start the game, build as many villagers as you can, and put them on wood. After you've got around 300 wood, build a dock with tones of fishing ships for food. put the vilagers that built the dock on gold (for now).
In the classical age, build 10 infantry, 5 calvary and 5-10 archers (if you can) and around 5-10 myth units. when you reach the herroic age, build a midgol stonghold/hillfort/fortress for seige towers and catupults. make 4 of each each time you advance. If you do this each time you advance, you'll have a great army by the time you reach the mythic age (40 infantry, 20 calvary, 20-40 archers, 20-40 myth units, 8 catupults and seige towers, as many heros as possible)
with your market, build lots of caravans to get your gold. put 3 villagers on wood and one for building walls, towers, ect... kill your extra ones for population.
always go beyond the population limit when making units. that way you'll have reenforcements mid-battle when your original units die.