Survival preparation is about preparing for crisis and how to come out alive and well.

It is risks management and identication.
1. what is the chance of each type of natural disaster(flood, earthquake, bushfire, etc) impacting your neighbourhood.
2. Prepare for the most likely disaster.
3. although the goverment advise to prepare a 72 hours / 3 days kit. The idea is that help will arrive within 3 days. You may want to prepare for a longer term such as 2 weeks or 3 months. Recent disasters, such as the flood in NO, earthquake in China, etc, help take longer than 3 days to arrive.
4. your survival kit should only contain essential items that will keep you alive.
5. Food - when you do your weekly shopping, you may want to spend 5 dollars to buy something extra for your pantry. eg. instead of buying 5kg of sugar, you may buy 7 kg. So that you can deposit the extra 2kg into your pantry. After sometime, your pantry will be well stock. To prevent food spoilage, I would suggest when you finish your sugar, take from your pantry. Then remember to topup the sugar on your next shopping trip.

Example - water for consumption & use, it is not necessary to store 2 weeks worth of water. It is more realistic to store a few litres of drinking water for your immediate needs. Then find a water source and process it with a portable water filter & water treatment kit for further ongoing water requirement.