"For each cup you make, use one spoonful of coffee, no more, no less (don't cheat!) and add one for the pot."
How much is a spoonful? A teaspoon - a tablespoon - or a lexan spoon?
Most coffee producers, and even old cookbooks suggest two teaspoons per cup. Also, bitter coffee occurs from too much heat or over percolation, not from using too much coffee. Best to let the water settle a few seconds after boiling or risk scorching the beans.