Oven and grease cleanup

Put a half inch or so of ammonia in a shallow nonmetal container and leave it in a cold oven overnight. Fumes from ammonia is what does the job, so if you have grungy pots and pans, put them in there, too. The whole mess will clean up with soap and water and just a little elbow grease in the morning.

Cooking fat

If you eat bacon, you might as well save the bacon grease to use in other things. Try it instead of butter on popcorn, or put it in green beans or use it to grease the pan for cornbread. It's free and you eat it anyway when you eat the bacon.