Anything can happen at any time of day whether its a black out, a fire, a earthquake, zombie apocalypse or CBRN attack It is always good to be prepared.

Step 1: The Basics

Usually one I.C.E pack will be good for all four of these emergences so good things to include are

-Emergency blankets/Space blankets (depending on how many people are in your house. There the real thin shiny blanket things you can pick them up at Walmart or any where that sells camping supplys)
-Flash-lights (preferably the wind up or non battery powered kind if not then have extra batteries)
-Canned food/water (at least enough so you can hold down the fort for at least a month)
-Extra clothing (hot wear to cold wear)
-Water purifier (for when you run out of water)
-Knife or multi tool (never know when it comes in handy)
-First-aid kit (depending on what you're doing it could range from very basic to complex)
-Rain gear/Sun gear (I guess that would be included extra clothing)
-Fire starter(s)
-Generator (If you are able to stay in your house)
-Gas masks (good to have even if you don't need them)

Step 2: First-Aid

A basic First-Aid kit would include

-Band-aids or bandages
-Antiseptic
-Surgical mask
-Painkillers
-Aspirin
-Ibuprofen (Motrin or Advil)
-Tylenol

A more complex one would include
-Band-aids or bandages
-Antiseptic (more then one type)
-iodine
-rubbing alcohol
-ect.
-Dressings
-Wrap
-Moleskin
-Needles/Scissors/Trauma shears
-Painkillers
-Aspirin
-Ibuprofen (Motrin or Advil)
-Tylenol
-Surgical mask
-Lighter
-Tweezers
-Thermometer
-Flash-light
-Cotton swabs

A more complex First-aid kit is prefered but you gotta make due with what you have

Step 3: How to Purifie Water

First you need a CLEAN container, CLEAN white cotton cloth, unscented chlorine bleach, a pot and fire

Step 1
Filter water through a clean white cotton cloth (that will get some of the pathogen out)

Step 2
Add a couple drops of your unscented chlorine bleach to the water and shake it up and let it sit (this will kill more pathogens)

Step 3
Boil the water
This is very important but you will want to let it cool off a bit if it is hot where you are. Cold water helps keep the core temperature down witch is important because you don't want to get heat exhaustion. As far as I know this will not work on salt water BUT it is good to have at the most 1 cup of salt water a day. DO NOT HAVE MORE THEN 1 CUP A DAY! the salt water quenches your thirst for a little while but soon it will come back even worse but if you have 1 cup then it will restore some of the nutrients your body needs.

Step 4: Zombie Apocalypse

in case of a zombie apocalypse you also need a weapon preferably something quiet and long range (don't want to attract zombies to your location) so a gun with a silencer or a sword or something along those lines. DO NOT LEAVE YOUR LOCATION UNLESS YOU ABSOLUTELY HAVE TO!!! A bunker with its own power food supply and water will be perfect wait for help. In the case you do have to leave
- Take your gun
- Take a sword of some kind for when you run out of ammo
- Take something to create a distraction
- ALWAYS STAY IN A GROUP

A perfect gun would be
- Light
- Bull-pup design (so you have a long barrel but not a long gun)
- Silent (could be a quiet gun or a gun with a silencer or both!)
- Most common round for your location (so 9mm and in the U.S. .223 x 5.56 NATO round)
- Bayonet attachable

Now in the case you encounter a zombie hoard (10 or more) you will need a detraction or something to make a loud noise like a grenade or something so what you do is take your grenade (or something) and throw it as far away from you as you can or hand it to the strongest person/farthest throwing person in your group and have them do it.

When you run out of ammo you will need something for melee (sword or bayonet) you need to hit them in the head destroy the brain or hit them in the back of the neck to dislodge the brain from the rest of the body (easy to do on paper) these two places are also where you want to shoot

Triangle of death
By all means STAY OUT OF THE TRIANGLE OF DEATH! The triangle of death is the the connection of the zombies mouth and in-between the two arms if you do back out as fast as you can or hit/go under one of the arms and get away as fast as you can!

If they are Redneck Torture Zombies there is no hope you are screwed they will not die

In this age zombies are totally possible with all the diseases and chemicals we have

Step 5: CBRN (Chemical, Biological, Radiological and Nuclear)

Your country should have CBRN defence but if not and there is an attack then stay in a underground bunker with your ICE pack inside and have a supply of gas masks and filters for them also you will need a HAZMAT suit please check out this Wiki article for more information