If you're trying to give up or reduce your caffeine intake try drinking green tea.
Black tea has about 1/2 the caffeine of coffee; and green tea has about 1/3. You can further reduce the caffeine in green tea very easily. Make your tea in a pot or cup, let it sit for about 30 seconds, then pour the water off. Refill and this time drink it.
The only difference between green tea and black tea is that black is fermented and green isn't. Apparently (and I can't remember where I read this) this means that green tea releases its caffeine very quickly, so you end up pouring most of it down the sink. (Or pour it into a container, let it cool, and water your pot plants.)
I add sugar to my green tea (gasp, shock, horror) and depending on the brand of tea I can't tell the difference to black tea.