Bacteria is what causes cottage cheese and sour cream to go bad. If you store them UPSIDE DOWN it creates a vacuum in the container which stifles the growth of bacteria and they last much longer... science lesson over :)
How to stay sharp in the kitchen: Knife expert Galen Garretson of Town Cutler in San Francisco tells us everything we need to know about knives. But beware; after reading this, you might find yourself wanting to chuck out all your perfectly serviceable knives to buy three cool-looking, razor sharp new ones. According to Garretson, that's all you need.