Shelter is a vital aspect in the success of a player in Minecraft. It offers not only protection from hostile mobs, but a place in which to conduct most (or even all) of any necessary operations, such as Crafting, Smelting, and Enchanting.
Shelters can be built into cliffs, underground, in the sky, or even underwater (However, due to long building time and complexity, this is not recommended for beginners).
Building MaterialsThe material from which a shelter is built is largely up to the player, although a tough, incombustible substance is strongly recommended. Stone or Cobblestone is ideal. Wood, while aesthetically pleasing, is susceptible to Fire.
A shelter should have no holes in it and should be well lit to prevent Mobs from spawning inside. It is recommended (but in not essential) to make the ceiling no more than 2 blocks high, so that Endermen cannot teleport inside, possibly taking a block from your home. A bed is a necessity as well, because it not only resets the spawn point after use, but also speeds the passage of nighttime. A shelter should always have Trapdoors and/or ordinary Doors, which should always be kept shut so as to prevent monsters from accessing your shelter. It is recommended to have more than one exit, should your door be broken down by zombies only on Hard difficulty.