-- Make vegetable stock! broccoli stems, carrot ends, potato peels, etc. can be thrown in a slow cooker along with 5 to 6 cups of water and some pepper (you can also add other seasonings that you like--garlic, ginger, etc.). Set the slow cooker on low and leave it for 8 to 9 hours. Strain it and let it cool then freeze. I like to freeze it in ice cube trays to make it super handy. If you only get small bits of veggies at a time, just freeze the veggie bits until you have enough and time to make the stock.
Apples and Pears that are a little too ripe?
-- Slice them and sautée them in a pan with some oil (or butter), diced onion, and pepper. Pairs amazing well with pork. Probably would be tasty with chicken or fish too.
-- Bake them with a small pat of butter, raisins, cinnamon, and brown sugar in a 350 degree oven for 25 minutes for a delicious dessert.
Stale tortilla chips, crackers, plain cereal, etc.?
-- Crush them and turn them into bread crumbs. There great in homemade hamburgers or meatballs! Just make sure you remember to reduce the amount of salt you add if what you are crushing is high in sodium.