potable water 10L per person to provide for 3 days (if possible have 2 weeks worth)
water filtration system
paper and pencils
deck of playing cards to keep you sane
whistle
a reasonable amount of cash in small denominations as credit cards and ATMs are not likely to be functional for sometime if there is a widespread power/internet outage
torches/headlamps + extra batteries + omnidirectional solar-charged lantern
battery powered or hand-crank radio + extra batteries for weather updates etc
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medication supply for at least 7 days plus analgesics/asthma meds/etc
sanitation items - extra toothbrush/toilet paper/etc
multipurpose tool
wool blanket for bushfire survival and warmth
space blankets
non-perishable food to last at least 3 days (preferably 2 weeks worth)
copies of important documents and family/friends contact information and map (consider storing in waterproof fire proof box)
smartphone chargers
gas cartridge stove system with pots