Quick Answer

Long survival worlds usually run out of repeat materials before diamonds: iron, paper, food, XP, wood, gunpowder, and trade materials. Farm priority should be based on daily use, not on how impressive a tutorial looks.

Material Priority Table

MaterialSource DirectionUse
IronIron farm, miningHoppers, rails, tools, redstone machines
PaperSugar cane farmBooks, maps, trades, rockets
XPTrading, mobs, smelting, Nether quartzMending, enchanting, book combining
FoodCrops, animals, villager tradesExploration and combat sustain
GunpowderMob drops, creeper farmsRockets and explosive materials

Build Advice

Build small farms that immediately improve the world, then connect high-frequency materials to storage. Avoid giant machines for resources you might need someday; maintenance can slow the entire survival file.