For those who don't want to read the whole thing.

Use your brain regularly on many types of tasks, drink coffee or tea, play video games, exercise, and provide your brain with either proper nutrients or appropriate levels of supplements. Too much or too little supplements will have negative or no effects. Everything else doesn't have enough research and some side effects might not be what you wanted. Not to mention there are placebo effects as well.

If you didn't know that before then go ahead and read it. You might get something from it.