When I get around to making these breadcrumbs I usually make a big batch and store the leftovers in an airtight container in the freezer. This way, it isn’t such a pain when a recipe calls for breadcrumbs. I used to buy the store-bought variety (by Progresso), but when I recently looked at the label and lost count of the number of unpronounceable ingredients I decided never again on those! As a reminder, it only takes a few simple ingredients to make bread.
Update: We’ve since found a decent store-bought alternative made of 100% whole wheat, but we still make our own, too.