There's already a lot of evidence that coffee is good for certain aspects of your health, but a recent 30-year long study suggests it may actually help you avoid a premature death.
The study, conducted over the years by several researchers at the Harvard School of Public Health, and recently published in the journal Circulation, involved over 90,000 women and 40,000 men. The results of the long-term study suggest that drinkers of both caffeinated and decaffeinated coffee will have a lower risk of death from cardiovascular disease, neurological disease, type 2 diabetes and a lower chance of suicide.
It's important to note, however, this study is largely based on an association between coffee consumption and the long term health of the participants who drank coffee. Correlation does not always mean causation, but the size and span of this study certainly gives some credit to coffee's health claims. Having a cup or two a day might do a whole lot more than wake you up.