When I bought a pack of cigarette in the Philippines it scares the hell out of me, even though I already know that it could harm my health, but I'm still not convinced until I saw this disturbing image that wrap in a pack of cigarettes.
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One of the reason I smoke is because of the benefit of nicotine; a brain stimulant that is necessary when I do brainstorming. But from now on I will only drink coffee as one of my brain stimulant.
There's a lot of long term benefit of coffee whether it's decaffeinated or not, it's not only a stimulant but it's also an antioxidant. It can prevent some cancers, parkinsons and diabetes.
Me, left side, reading a book, THE ART OF WAR drinking coffee with my engineering friends, having stimulating conversation. But I wouldn't suggest drinking too much coffee, because It can lead to heart problems, sometimes death, anxiety and depression.
So drinking coffee so far is the best brain stimulant to make a better decisions in real life situations.