There are two easy ways to save money without much effort. The first is to find an inexpensive alternative to an item you regularly use -- like grocery bags as lunch bags or garbage bags. The other, is to find something inexpensive that will preserve or protect something that is expensive, like buying a cover for your phone. For both, Rob gives you the common coffee filter. Coffee filters have dozens of uses other than the one intended, and you can get them by the 100s for next to nothing.