Easy, Top 5 items:
1. The Sentry file safe and little personal safe that is inside my gun safe. They contain emergency cash, passports, SSN cards, and a myriad of other important documents;
2. Go-Bag that contains toiletries, medications, wallet, keys, cellphone, firearm, and several pre-loaded ammo mags;
3. Tote (yellow/black storage tote) already filled with my most important file folders;
4. Tote already filled with photo albums / sentimental mementoes;
5. Flat of water / food / dogfood;
I learned a lot talking to a lady that owns a safe store in an area that had been devastated by fires a few years ago. She told me a few very important things.
Firstly, DO NOT put anything in the safe that is in plastic protective covers or ziplock type bags. Coins, baseball cards, photos in albums, etc. They will melt and completely and totally ruin their contents. Digital media like thumb drives, diskettes, hard drives, etc. are plastic - they will melt.
Secondly, if you're going to store cash you have to do it right. Loose is not correct. Get a few of those little metal airtight cans like PVC glue comes in (links below). They're about $30 for a dozen. The inner seals for them are about $3/dozen. Next, get some silicone (not rubber or elastic) hair ties. Then, go to Home Depot and a get a foot of copper wire that is fairly stiff and about the diameter of a penny nail. It will run you about $3. It's located in the electrical section where they have reels of different size wiring. Go to the bank and get $480 in twenty dollar bills and $20 in singles.
Take a 3-inch section of that copper wire (cut with pliers into 3-inch sections). Then start VERY TIGHTLY wrapping twenty dollar bills around it. Wrap all the twenties around it. Then wrap the 20 singles around it. The tighter the better. You are trying to eliminate air gaps to prevent your money from going aflame. You will end up with a roll about 1.5 inches across. The outside singles are sacrificial in the very rare case the heat gets crazy and starts singeing the money. The singles are protecting your twenties, essentially. The copper nail-like section acts as a heat sink. Wrap the silicone hair tie around the roll and seal up the whole thing in one of the little cans. Silicone has a very high melt rate of approximately 500F. There you go, the best way to store emergency cash.
Having lived through the Northridge Quake, I learned Cash Is King. No electricity means no ATMs and no store's Point of Service works. That means no debit card or credit card transactions. A $5 flat of water will be priced at $20. There will be extensive price gouging and you WILL pay it because very shortly afterward all supplies will be sold out to those that will pay it. The money will go fast. If an item is priced at $13, you are going to pay $20 for it. Why? Because NO ONE will make change. That is why you do not store one-hundred dollar bills as emergency cash. You will want/need twenties, and LOTS of them. The singles from your bundle of emergency cash are also very useful. Hundreds are not useful. If you have something that others want, they will take it from you - by brute force if need be. Hence the firearm and the ammo.
You just need enough to survive for a few days or, at worst, a few weeks until order and some semblance of normalcy and utilities are restored.
Amazon.com
Screw Cap Can: 4 ounce Round Solvent or Utility Can | Screw Cap Can: 4 ounce Round Solvent or Utility Can
Innerseals for 1 3/4" Caps | Innerseals for 1 3/4" Caps