5. Don't forget about fluids
Keeping hydrated is crucial for concentration, so make sure that a bottle of water is not forgotten but is sipped throughout the day to keep you hydrated.
You should aim to consume 2
Getting a 500 ml bottle and making a conscious effort to fill it at least three times throughout your day is a great way to make sure you are reaching your required intake (assuming you have hot and or cold drinks alongside this throughout the day).