Eat - eat regular meals to help you avoid feeling lightheaded.
Sleep - a good night's sleep will boost wellbeing.
Drink - drink plenty of fluids 24 hours before donating, but avoid alcohol.
Wear - put on loose and comfortable clothing, avoid tight sleeves.
Distract - nervousness is normal, come with a friend or bring along a book or MP3 player so you can relax during your visit.
Know - knowing your medical, body piercing and travel history will save you time.