If sipping on a store-bought cup of coffee is one of your daily rituals, you could be laying out a lot more cash than you realize. Sure, a standard 16-ounce grande cup of plain black coffee at Starbucks costs a modest $2.25 before tax. That's chump change. But when you multiply that by one work week or one month or one year, even, the numbers become substantial. If you could give up your coffee addiction or get used to the free brew in your office, you could save that money, or use it to buy a host of other treasures.