Always use fresh water-- and make sure it's cold. The flavor of the water is going to affect the flavor of the coffee you brew.
Use fresh beans. Protect your NH Coffee beans by storing them in a sealed environment. It is best to grind your beans immediately before brewing.
Use the right proportions. The coffee will have the best flavor if you use about two tablespoons per six ounces of water. You can add small amounts of water if your coffee tastes too strong or bitter.
NH Coffee always tastes the best if it is served right after it is brewed. But don't burn yourself! Enjoy!