Sure, you think your house is safe right now! Well on single player it probably is.... Unless you play single player like a bossaura!!!!!!!!!

"Gee my 4 walls are so safe" but then you know those 500 creepers that were planning to bombard you because you killed 1 pig! You aren't safe then! So let me tell you how to set up those mega-uber-tastic defense!
(These will be step by step)

1. Get the materials; now I don't mean that stupid stuff you find on the ground! What is it called? 'dirt'? That sounds pretty dumb! I mean go get your lazy butt up off that stupid 'dirt' and get that wood! Cut down those trees for days! Get that cobble! Ladies love the cobble. I want you to get diamonds! Just for my enjoyment! NOW GO DO IT!

2. Set up the walls; small only wood planks walls? I THINK NOT! We want cobble, smooth stone, logs, AND wood planks! 4x4 house? NOPE! 10x10 is minimum! Now don't just go their and randomly place blocks! We want this looking nice! Start with the frames! Get some glass in that! Now we are ready to move on!

3. The Roof; "OHNO SPIDERS" you may say? WELL SCREW THEM! We are going to get some sky lights up in here! Now go out their and get some glass! Sand falls? NO WAY! We are so good at this we defy logic! Stand right underneath that crap! Get sand, go home, make furnace, SMELT! get the glass on the roof, no more unannounced as soon as you get out the door ambushes!

4. Roof Lib; Tired of all those spiders jumping down from your roof? Well they won't be up there anymore! just simply put a block around the top part of your house on the outside! It stops them from climbing onto the roof, but it doesn't stop them from still getting you!

5. Mecha Door; Mecha door? That sounds really cool right? Well it its! Gotta go mine that iron! (Mine should not be in house, stuff can climb up) get 12 pieces of that awesome stuff! craft them into doors! Place them down! Get that red-stone! Get that lever! Put lever at the back of your house! Wire up that stuff! Now you are ready! No unwanted guests are coming in tonight!

6. Bed; Bed is after mecha door? WHY YES IT IS! You needed the nights to mine! Now get that wool! With the sheers that you magically now have! Cut that sheep up! Get 3 pieces of those glorious wooden planks! Now we can craft! Place it down! WAIT! Keep it away from that wall! What wall? THAT WALL!

7. Chest Origination; How does that have to do with defense? EVERYTHING! If you can't find your swords and armor you are surely going to die! Set up the food chest, building chest, organic chest, Tool chest, and the armor chest! WE GOT CHEEEEEST FOR DAAAAAAAAAAAYS!!!!

8. Outer Walls; Outer walls to guard your fields and farms are good! But don't use fences because they are easy to jump over. Use something strong like Obsidian. And use Iron piston doors! Make sure the switch for the iron piston doors are in your house! Put Lava on top to block people from climbing over! And/or Dispensers/Fire Dispensers!

9. Golems; Iron Golems and Snow golems are helpful if you get attacked, but snow golems don't do much! Just surround your house with Iron Golems! Not just to prevent the mobs but if another player hits you they will go all beast mode on their faces!

10. Endermen Leg Shot; Sort of explains its self! Just a little hangover that is 2 blocks high and you can hit a Endermen from underneith :)

11. Get Away: A secret door is the best way to go when running from the nubs! You will need pistons, Sticky pistons, redstone, repeaters, and more! (Make traps along the way just incase they follow) SO GET TO IT SON!

This is just a couple ways you can defend your house against players and mobs! I hope you enjoy!