Purity of water plays an important role in the overall flavor of your coffee. Use the purest water you can get for optimal flavor.
Freshness of your coffee plays a vital role in making the best cup for you. Coffee should be fresh roasted within a week and ground just prior to brewing.
The amount of coffee you put into your brewer depends on the size of your brewer. Too much coffee and it will be too strong or overflow. Not enough coffee and it will be weak and watered down.
Grind is the size of the ground coffee bean. Too small and coffee will over brew and possibly overflow. Too large and the water will drain through without brewing. Grind size varies depending on brewing method.