Safe in the Mushroom Biome
No hostile mobs will spawn in mushroom biomes.
Bring an empty bucket with you whenever you go underwater, when ever you are getting low on air just use the bucket and a single block of air will appear under water for a split second.
Make any mushroom a giant mushroom by using bone meal on it.
Every time you open Minecraft there is a 1 in 10,000 chance that the title will say "Minceraft" instead of Minecraft.
Any villager can fall in love and raise a family. Just make sure that he or she has an empty house with working doors and they will move in a raise a baby villager.
If a spider takes damage from a cactus it will become neutral.
Looking at an Enderman through transparent blocks will not make the enderman go hostile.
If you throw a chicken egg at a docile spider and hit it, the spider will stay docile.
If you can find a saddle, you can put it on a pig and ride it, but you can't control it.
If you put a saddled up pig into a mine cart you can drive it like a car off the tracks.