For the best cup of coffee, start with quality beans and store them properly to maximize freshness and flavor.
Keep beans airtight and cool
Your beans’ greatest enemies are air, moisture, heat, and light.
To preserve your beans’ fresh roasted flavor as long as possible, store them in an opaque, air-tight container at room temperature. Coffee beans can be beautiful, but avoid clear canisters which will allow light to compromise the taste of your coffee.
Keep your beans in a dark and cool location. A cabinet near the oven is often too warm, and so is a spot on the kitchen counter that gets strong afternoon sun.
Coffee's retail packaging is generally not ideal for long-term storage. If possible, invest in storage canisters with an airtight seal.
Buy the right amount
Coffee begins to lose freshness almost immediately after roasting. Try to buy smaller batches of freshly roasted coffee more frequently - enough for one or two weeks.
Exposure to air is bad for your beans. If you prefer to keep your beans in an accessible and/or attractive container, it may be a good good idea to divide your coffee supply into several smaller portions, with the larger, unused portion in an air-tight container.
This is especially important when buying pre-ground coffee, because of the increased exposure to oxygen. If you buy whole beans, grind the amount you need immediately before brewing.