Preppers are known for storing food in sealed buckets. There is a problem with five gallon buckets. If you need to open a bucket of rice for a short term emergency, such as a snowstorm, then you have to finish using five gallons of rice. There is another way.
Vacuum seal packages of non-perishable foods in smaller amounts. Amounts can vary but use a reasonable amount that your household would use up in a few weeks. Since Mylar bags are hard to seal with an inexpensive vacuum packing system, I use the bags intended for my vacuum sealer instead. Those bags are not long term storage so I put one inside a Mylar bag and seal it. Now I have vacuum sealed and Mylar protected package of food. The small amount of air between the bags can be eliminated with an oxygen absorber.
For food variety put a few different vacuum sealed bags in a bigger Mylar bag. Bucket sized Mylar bags work in buckets. There is wasted space in the bucket but it can be filled with clothing, linens, paper products, or small bottles of spices. I also add a jar of instant coffee, some sugar, and a small bottle of booze. The bottle is to bribe drunks, to drink, for medicine, or trade for other things. Instead of a bucket of rice now there is a variety of food opened.
Storage space can be hard to find and organize. Smaller things can stored in spare mason jars (lighters, matches, can openers). Beans, quinoa, and amaranth sealed in spare jars make for some variety if bugging in. I also keep extra popcorn and hot chocolate in jars. The bigger mason jars are filled with potable water. Even if the basement floods those jars should stay sealed. Tea candles fill jars with hinged lids and double as decor. I want to paint the inside of the jars, and use them for less decorative things like extra toothbrushes and OTC medicine. I expect there will be people coming to me for help in an emergency situation so I want to fill some painted jars up with those little soaps, combs, and toothpastes. Then I will just give the entire jar away.
Of course you can always go with commercially packaged long term survival food. I trust the cans more than the buckets. The little packages need to be protected and sealed into some solid type of container.
I keep a small pile of books I have not read yet. I need a battery powered lamp I can read by. Akindle or iPad with unread books on it would solve the storage and the light problems (if you have a way to recharge it). You can store a library on those devices. Make sure the books are actually on the device or you won’t be reading much when the grid is down.
In my bug out location I keep a selection of half used clothes. That is clothing already worn so I know they fit and I like them. It is tempting to store things you bought and don’t like for times of need, but do you want to be stuck with potentially uncomfortable clothes that you don’t like?
Storage for long term survival is a challenge. Organizing the hoard for short term emergencies is as important as long term storage. Using decor as storage makes more use of space. How do you use limited storage space?