We have a scale and weigh things like ground beef. Chicken breast I try to buy the packages that are close in qty and lbs, so I can make it easy, one breast per meal is close to a lbs. We have deli containers and use plastic wrap sometimes so it doesn't take up too much space, but just our normal fridge freezer. We recently moves to a house out of our condo, so we have a basement finally where we store our shelf stable items. I bake all our bread, so we buy flour in bulk 25lbs bags that sit in containers, making loaves as we need.

Edit: Wife will make large batches of freezer meals for quick meal night,s like 4 lbs of bolognese and separate into 1lbs portions that can be a quick 1lbs pasta night. Or make soup dishes that can be poured over rice/quinoa to make it go farther.