Summarize the following:
The refrigerator can potentially expose roasted coffee to undesirable conditions. The fridge is a moist place, so the beans or grounds are likely to come into contact with moisture. It can also introduce unwanted smells into coffee. If you are going to use the coffee you have within a few weeks, keep it at room temperature instead of putting it in the fridge. As soon as coffee is ground, it begins deteriorating very quickly when exposed to air. Pre-ground coffee therefore tastes and smells much staler and less vibrant than coffee ground freshly before brewing. If you are interested in storing your coffee to achieve optimal flavor, it's a good idea to invest in a coffee grinder so that you can grind coffee beans just before brewing. Aim to purchase your coffee in small quantities that will last you a week or 2. Buying as small amounts as possible will ensure that your coffee is fresh when you brew it. Having to store large amounts of coffee will most likely lead to stale coffee, no matter how well you store it. You can get fresher coffee in a valve-sealed bags than a vacuum-sealed bag. In general, coffee in valve-sealed bags is put into its packaging right after it has been roasted, while it takes a few days for vacuum-sealed coffee to get packaged. Coffee off-gasses for 48 hours after roasting, so coffee in a vacuum-sealed bag has to sit outside of packaging for 2 days before it can be vacuum-packaged. However, coffee can be put directly into valve-sealed bags because the valve on the bag allows the gasses to escape.

Summary:
Don't store coffee in a refrigerator. Avoid grinding your coffee in advance, if possible. Buy small amounts of coffee. Buy valve-sealed bags rather than vacuum-sealed bags.