Build a villager trading hall
Cure zombie villagers for cheaper trades
Trade with librarians for enchanted books
Reset librarian trades until you get the enchantment you want
Use an enchanting table with bookshelves around it
Enchant books instead of gear when possible
Combine books with an anvil
Use a grindstone to remove bad enchants and retry
Farm XP from mobs, mining, or furnaces
Use the best material gear before enchanting
Get Mending and Unbreaking first
Get Protection, Sharpness, Efficiency, or Power depending on the item
Use Looting, Fortune, or Silk Touch as needed
Fish for enchanted books and gear
Raid structures and loot chests for enchanted items
Use an anvil efficiently to avoid high repair costs
Keep spare books and gear for better enchantment combinations