"Ever wished you could think more laterally to solve a problem? In future, maybe you'll just use a bit of mind-boosting technology: zapping the brain with electricity helps people think outside the box to solve a task.
Transcranial direct current stimulation (tDCS) is a safe and non-invasive method of temporarily altering the activity of neurons by passing weak currents through electrodes on the scalp. It can enhance mathematical skills,memory, attention and language learning."
More at NewScientist
I want one of those zappers. Might just help with this last exam left.