Mustard can make you feel a lot better if you are suffering from a cold. If you use it like a vapor rub and apply it to your chest under a wet towel, you’ll feel better in no time at all. Butter can help you untangle all of those knotted necklaces that are in the back of your jewelry drawer. Just slather some on, watch the necklaces slip apart, and rinse them off. That high-calorie mayonnaise in your fridge that you are trying not to eat because it will ruin your diet is great for getting crayon off the walls. The next time your kids draw all over, don’t worry. Slather some mayo on there and wipe it all away. Olive oil is a great product for your skin, as well as to quieten creaky hinges. If your dog or cat brings home fleas, using salt is a great way to get rid of them around the house. Just pour salt into the vacuum cleaner and around the baseboards. Let it sit, then vacuum the salt up. The salt dehydrates the fleas and kills them. Be sure to throw away the vacuum bag or empty the vacuum bin immediately, or some of the fleas can crawl back out.