#1) Buy as much food as you can. Caned food, dry food and things like salt, sugar, flour, oats and any other food needs that you can store.
#2) Buy as much water or store as much as you can. And remember that bleach will not work to store water, you must use Stabilized Oxygen like OxyDrops.
#3) Get you guns ready to use, that means clean, oil and have them ready to pick up and use. But please use you brain on this don't leave you guns out for young kids to get to. Have back up parts for your gun, I don't think you will find parts very easy after the collapse.
#4) Buy as much ammo as you can find. You can even buy ammo you don't use and use it for trade.
#5) Buy back up items for you car or truck, like oil, wiper blades, parts that you know you will need. There will be a time when you will not be able to find this stuff.
#6) Buy medical supplies, all you can get.
#7) Get barter items, things that you know you can trade with like coffee, alcohol, beer(for the short run) and many other items. People will need there vices.
#8) get any house hold items you will need to survive, like paper plates, cups, trash bags, and other items you will need.
#9) Seeds, you will need lots of seeds and know how to use them.
#10) Stand ready and look for the trigger that will start the end.