Have you ever noticed that letting one potato in the bag go moldy makes the rest rot faster, or that leaving a head of lettuce to liquefy in the crisper seems to have an adverse effect on all the other veggies in the drawer (not to mention your enthusiasm for eating them)? Taking a proactive approach to food maintenance will help you reduce spoilage and have more confidence in the leftovers you have in your fridge. Discard spoiling food immediately. Keep vegetables like potatoes and onions separated to prevent naturally occurring ethylene gas from turning them too quickly. Reduce the risk of encouraging bacterial growth by keeping your sink, refrigerator, cutting boards and stovetop clean. Americans waste a staggering 30 percent of the food they buy every year. Taking the time to tidy up will make it easier to reduce that figure and save some green at your house.