Gizmodo explains the ins-and-outs for making a truly great cup of coffee. There’s a lot of great advice! But. For most people who buy already-grinded beans from the supermarket and throw it into Mr. Coffee the best thing you can do to take your coffee experience to the next level is to buy a conical-burr grinder and a Bodum French Press.
Drink it black until you’ve developed a palette for the varying tastes of coffee beans (buy good beans too from a place like Stumptown or your local coffee house) and then go back and read Giz’s piece and use their advice to then take your coffee making/drinking experience to a whole’nother level.
I’ve been using the French Press/burr grinder (mine’s not conical and on the low-end at $50) method for a few years now and I haven’t been disappointed.