Now, you are used to having no caffeine after putting it down for 28 entire days! Your new, super-fueled metabolism will be better able to handle the occasional cup of Joe, but before you start sipping, ask yourself: Do you feel better, clearer, and more energetic now that your system has been caffeine-free for a month? Have you enjoyed using the money you would have spent on coffee for other things? If so, you might consider putting down the coffee for good — or you can explore caffeine-free coffee substitutes.