Build a path of markets across the island to extend your influence. Once the chain is established, you can delete the middle markets to save the hefty upkeep cost of 250 gold pieces each. Just ensure that the remaining markets' service areas overlap slightly so your territory remains connected.
Once you land, place your first warehouse in the middle of an open field. As one veteran guide advises: "Build the first warehouse with the intention to divide up your initial building area." For example, place housing on the left side and production/supply buildings on the right side. anno 1503 city layout