That espresso doesn’t just wake you up. Coffee drinking has been linked to a lower risk of several diseases (such as diabetes and prostate cancer), and it may even help you live longer. Researchers suspect the combination of caffeine and antioxidants are responsible for many of the observed health benefits. (A 2005 study found that coffee is the number-one source of antioxidants in the U.S. diet, believe it or not.)
Of course, loading coffee up with cream and sugar may erase any potential benefits. So skip the fancy flavored drinks, and stick with skim milk.