Things that are addictive, like caffeine, I find it's harder to just have a little taste and then stop than it is to go cold turkey. So, I will sometimes have a few sips or half a cup, maybe every three or four days. I like to test my own self control. A domme able to control herself is better able to control others. Just my thoughts!
I have friends who take breaks from their hardcore coffee habits by drinking green tea. It has next to no caffeine, but it does have JUST enough to hold back headaches while they "dry out".