Read more here.Although I do NOT drink coffee, I found this link to its positive effects:
Q: Can coffee help boost my memory?
A: Memory can be divided in Short Term Memory (STM), working memory (the part that is using active information) and Long Term Memory (LTM). Coffee helps mainly with STM and the working memory when normal amounts of information have to be dealt with. With trying to cope with huge amounts of information, coffee does not help STM, your working memory or LTM.
Q: Can coffee lead to better learning?
A: Learning is the acquisition and storage of information. Coffee helps to improve alertness, attention and wakefulness and by that means, facilitates learning
Q: Does coffee drinking help my learning when I am not in the mood to drink coffee?
A: No, coffee optimises your mood when you feel like a cup of coffee.
Q: Will coffee lead to better sustained attention or vigilance?
A: Yes, it compensates fatigue by increasing the level of alertness. The benefits are found mostly during the course of a long exam or test, when you get tired.
Q: Will coffee lead to better focussed attention when studying?
A: Yes. Drinking coffee helps to focus your attention to the main task, when there are many things around needing your attention. It draws attention to what you need to learn and leads to less distraction although doing different things at the same time may in itself be stimulating enough.
The Art Of Coffee

