Just thought I'd share something I've been doing a long time. All those vegetable scraps left over from chopping and the slightly wilty old veggies in the fridge you don't want in your salad can be reborn as yummy delicious veggie broth. And bread that gets a little stale (but not moldy!)=>croutons!
The trick is to keep a couple of ziploc bags in your freezer, one for vegetable scraps and one for bits of bread, and add to them gradually. (Don't put in broccoli, cabbage and other brassicas. DO add celery, onions, potato peels, mushroom stems. The rest is your call.) Once you have a bag or two full, make a batch of the broth or the bread.
Making vegetable broth is about as easy as boiling water (if a little more time consuming). For more flavor, add some herbs you like and some whole peppercorns (though it's amazing how delicious just the veggies alone smell). Simmer on low for a few hours (say, from dinner time to bedtime), let it cool overnight, and in the morning, strain, pour into containers and freeze.
And for croutons, just toss them with some concoction of melted butter, olive oil, herbs and peppers. And probably salt. Then toast them slowly on cookie sheets at about 250o
F for an hour or two. Let them cool, then store airtight.
Hope this is helpful to someone!