There are a million and one ways to organize, you need to pick the way that meshes with how you work. I know people who do the cardboard thing, I can't, I get lazy hallway through and then have a pile of bolts that I'm not sure their origin. Same with bags. I like the storage cases with multiple small bins inside, because even when I get lazy with labeling I can do keep myself separating the fasteners by where they came from and that's enough to figure out reassembly for me.