Sleep - It is important to be well rested. You should still have the energy you need to perform at your best.
Diet - In the few weeks before the test, try to work a light, healthy breakfast into your daily routine. If you already eat breakfast, good for you — don't change a thing.
Stress - Being too stressed about the exam can negatively impact your performance. Part of your test preparation should include getting mentally and emotionally ready.
Be aware of whatever anxiety you're feeling - Be aware of what your body and mind are doing and compensate for it.
Relax - Spend some time each day relaxing. Try to let go of all the pressures that build up during your average day.
Visualize a successful experience - Picture yourself confidently answering questions correctly, and smoothly moving past trouble spots - you can come back to those questions later.
Talk about it - Find a family member or trusted friend with whom you can talk about the things that stress you out about the test. When this person tells you that everything is going to be OK, believe it!