Scott Kveton, founder of Bacn.com, always saves his leftover bacon grease. He uses it to cook his next batch of bacon, creating a never-ending cycle of bacon grease creation, consumption, and reuse.   CHOW Tips are the shared wisdom of our community. If you’ve figured out some piece of food, drink, or cooking wisdom that you’d like to share on video (and you can be in San Francisco), email Meredith Arthur and tell us what you’ve got in mind.