While you slept during the night, your body has gone without water, so you wake dehydrated. Start your day with a glass of water and keep a bottle of water with you throughout the day to remind you to keep drinking.

Don’t wait until you are thirsty to have a drink – thirst means you are already dehydrated. The best temperature for water is luke-warm which is easier to digest though not always appealing. Try to avoid drinking very cold water, as this slows your metabolism making it harder to digest so much of it will be lost.

The average person needs two to three litres of water every day. Heavier people and those who are active need more, generally three to four litres is recommended.

Keeping hydrated is easy – it’s (nearly) free, flavourless and filled with potential for your better health.