Copi session

I've been in the same company for almost two years and my #1 administrative issue remains: How do you make a good cup of brewed coffee? I'm more of a hot chocolate and fruit juice person by nature. I try to indulge in a cup of coffee though once a week but I need take it before lunchtime or else I'm wired until well past midnight (It's genetic). So I've tried one tablespoon = 1 cup water, one tablespoon = one and a half cups water, even one tablespoon = two cups water and I'm still not sure it's good. What's your formula to a great cup?