You must ensure that the water you use is of the best quality. The SCAA recommends that you use a simple water filtering device (like Brita) or bottled water to produce the best results and that you avoid distilled water and water that has undergone reverse osmosis filtration.
Use 2 tablespoons of beans to 6-8 ounces of water, regardless of the brewing method.
When preparing coffee for brewing, grind the beans to a uniform size just prior to brewing. Match the grind to the brewing method.
The temperature of the brewing water has the greatest influence on the taste of the final brewed coffee. Look for a high-quality drip machine that soaks the bed of coffee uniformly, assuring maximum flavor.
For more detailed brewing information, the SCAA offers "The Basics of Brewing Coffee".