Some tricks are easy. Get enough sleep, eat sensible, keep fit. Then you repair damage made through lack of sleep, lack of certain nutrients or lack of blood to your brain.

But there is more: Hippocampus is the learning center and it is a trainable as a muscle. It can grow new cells, and cells can die, so its size will increase or decrease in response to mental training. It is a slow process and there is a limit to how much you can improve that way, but it is possible.

So turn of your TV and playstation, and start reading books, playing chess, taking lectures and solving sudokus and crossword puzzles. You will learn more and be more prepared for IQ tests, but you will also increase the capacity of the hardware inside your brain.

You will be smarter.