Cinnamon. I don't know what it is about adding cinnamon to coffee, but it makes it ten trillion times better. I think it cuts some of the bitterness. I used to hate coffee until I discovered that the kiosk at my University library sold cinnamon bun flavored coffee every Wednesday. Or, if you need more sweetness, there are a lot of sugar free syrups that you can add for flavor. I eventually just got the point where, unless the coffee tastes like the used sawdust at the bottom of a hamster's cage, I will drink it. But it started with cinnamon.