Make your own croutons.
Do it. You will be happy. Finally you won't feel bad when you throw away old bread. Finally you will only pay some pennies for tasty salad and soups add-ons instead of a few bucks.
White bread. Garlic Powder. Salt. Pepper. And...if you wanna get fancy...put some cheddar popcorn seasoning on it.
Cut up bread. put on cookie sheet. dip each little piece in the teensiest tiniest bit of olive oil. Then season to taste with aforementioned awesome (cheap) ingredients.
Let it bake on one side for 5 minutes then flip and toast to your liking at 350 degrees.