According to a US Study the caffeine in your coffee can boot your memory. Coffee is able to do this by does this by boosting the way your brain creates the circuits used to recall memories. This effect works for 24 hours after consumption. Read more about this study below.
Usually, when we learn things, memory circuits are first stored in the brain in a temporary form that can easily be forgotten. They slowly consolidate into permanent memories.
These findings suggest caffeine makes this consolidation more efficient, but scientists are still not sure of the biochemical mechanism.
SRC: Read the full article reviewing this US study at: http://www.standardmedia.co.ke/health/article/2000132586/coffee-can-boost-memory-power