The strength of your coffee can also be an indicator you need to replace your Keurig. If that first sip of the day tastes pretty weak, it could mean that the Keurig isn't as efficient.

Coffee maker: If we look at ground coffee, a 12-ounce bag of coffee based on 3-4 cups a day should last around 10-14 days. That means 24 bags of coffee a year. The prices of a 12-ounce bag can ...