I guess it depends on what flavor you want if any. I like to use up my old corn bread for crumbs. Toast them in a slow over until dry then store in an airtight container in the refridgerator or freeze.
I used to use Panko bread crumbs before GF, but now can get that same crunchyness using a premade cereal , just swirl it around in the processor a minute or so, and save in a airtight container on the shelf. It will keep as long as the cereal does.
For a cool variety, use ground up granola ( GF of course! ).
Good for doing oven fried chicken and breading fish fillets. Also for making meatloaf, or meatballs,and use to make gefilte if you make your own.