The best time to train your brain is in the morning, when it is at its most active.
Your brain is made up of about 80% water, so it is important to drink plenty of liquids to keep yourself hydrated.
Alcohol is very bad for the brain, because it can affect memory and slows down brain activity.
Caffeine stimulates the central nervous system and can make the brain more alert, but it can also induce headaches and nervousness.
The phrase �grey matter� refers to the grey-coloured tissue which contains the brain cells, known as neurons. The fibres that connect the neurons are called the �white matter�.