Minecraft wiki entry for The_third_day, associated text: By the third day, the player should have a basic shelter and basic resources, though you probably don't have enough resources to last for a long time just yet. Now it's time to gather more resources and/or improve the house. If you're adventurous, you can also go find caves, dungeons, strongholds and/or mineshafts to fight monsters and/or find ores, which will both be very useful for various reasons. If you don't feel safe encountering caves and similar structures just yet, the player can just explore in the Overworld and look for villages and temples, as they contain various loot. Try to make a few various farms, and use some redstone.