How to Drink Your Coffee: There's an App for That

I am an irregular coffee drinker. I don’t need it to get up in the morning, but I do need it after a rough night or a heavy lunch. I am also, though, an irregular sleeper. Some nights I find myself wide awake at 3 a.m. Could it have been that cup of coffee I had after lunch? Should I have had tea instead? Would that have been enough to get me through the afternoon?

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