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I got lucky, in that this video is the perfect video to show on nitrogen packing food.
Perfect in that it shows small amounts of dry foods being packaged in Mylar bags.  Mylar bags are easily found, just do a search on the internet.   Why small bags?  It keeps you from opening up large bags or plastic pails exposing your stored food to oxygen, the killer of food storage.
Even if you already have a regulator for wielding (oxygen or acetylene) the threads won’t match the nitrogen tank.  If that sounds like the words of experience  . . .  it is.  So renting both the nitrogen tank and the regulator is a necessity.  You will find that that company that rents the nitrogen tank will also rent you the proper regulator. 
Now that you have stored some dry goods in small Mylar bags you may want to store them further in a plastic bucket  labeling the contents with a marking pen.  An excellent source of plastic buckets with lids is the trash cans outside a local bakery or deli shop.  If they have held food before they are food grade plastic.  Merely take them home and use hot water and detergent to clean them out.
How long the food inside the Mylar will last depends on the temperature at which you store them.  This website gives you a good idea.  Notice sugar, salt and honey are ‘indefinate’ storage items as long as they are protected from moisture, and this isn’t nitrogen packed.  In other words, sugars, even sealed in a used coffee can away from moisture, will last indefinately.  
Here is another interesting video on 550 paracord.  It’s the cord that attaches to parachutes.
What he doesn’t mention is that the interior threads, that he shows, can be used for suture.   Also, 550 paracord can be used for shoe laces.  Why is it called 550?  It takes 550 pound pull to break it.   It can be used as a cloths line by stringing it up between trees and hanging laundry on it.  You can remove the strands and use it as fishing line or use the cord   as a tie-down for tents.  Everyone should have at least 50 feet of paracord if you plan to survive what lies ahead.   Best of all, it is cheap!!!
Here is a link to a short video that was sent to me by a good friend (Sage) on using the bottom of a coffee mug to sharpen a knive.  I tried it and it does work.   video  

You could even use the backside of a ceramic tile; where it has no glaze, to do the same thing.   I even used the cup to sharpen a two piece vegetable peeler as well as some kitchen knives.  
Sun Compass video