Most preppers like to store dried goods the commercial way, food grade buckets, Mylar, and O2 containers.
Mylar in my opinion, will only help keep them fresh longer. But with a 15 plus shelf life what's a they really aren't going to be fresh when you open them. I personally think that some preppers put way too much effort into it. I use a food grade bucket and O2 absorbers. I've had this argument with many fellow preppers and they quote the loss of vitamin/nutrition for the reason to overdo it. I feel that the loss of 5% nutritional value is more than acceptable, I'm looking for a full belly mostly.
The use of O2 absorbers is to remove the oxygen and create an environment that bugs can't grow. This is a necessary item if trying to store stuff for 10 plus years. Especially rice and flour which is a prime environment for bugs. BTW, do not use O2 removers with salt and sugar, unless you have a rock hammer to break it apart afterwards.
Dried goods like beans and pasta will last a while (3 to 5 years) with nothing special except an air tight container. In fact I remember eating 8 year old pasta from a mason jar once, and really there was no difference.
I have used 2 and 3 liter soda bottles washed and dried really well to store many items. I then stuff two O2 absorbers in there and I am good to go.
Flour is different altogether. I sealed 5 gallon pails myself, but I also purchased Augason Farms pails through Costco. Flour is risky at times due to all the bug eggs in flour just waiting to hatch. I have been opening some of my home packed pails and it really isn't that fresh anymore, so I wanted to make sure I had some for real long term storage.
Anyways, this is just the tip of the iceberg in regards to my experience with LTS (Long term Storage), feel free to be more specific and probably should be on a thread of it's own.
As mentioned in a previous post rice and beans are the most affordable way to put a lot of calories into storage. But however, that is just a start. I cringe when people tell me that they have 50 pounds of beans, 50 pounds of rice and 25 pounds of flour and are good to go for a few months. The only thing I can say to that is, food fatigue and nutrient deficiencies.
Then there's canned goods. I'll post my info on this later.