Turn on your PC. Modern games are great for making your mind work at amazing speeds

Certain fragrances help you think clearly and cut down on mistakes. Lemon scents stimulate your hippocampus, the brain region that controls your ability to concentrate; lavender helps you relax and think more clearly; jasmine has the ability to excite, resulting in quicker thinking.

Letting your brain run free is the best way of truly expanding your brain power. Every day, consciously defocus for 10 minutes, and see where it takes you.

Chewing gum improves memory and thinking, UK researchers have found. Chewing raises your heart rate, delivering more oxygen and glucose to the brain, while saliva triggers a surge of insulin, stimulating learning and memory receptors in the brain.

A recent study found that just 45 minutes of walking three times a week increased subjects’ ability to perform