Aromatherapy is great. Use the smell of mint to stimulate your mind and increase your memory while calming the nerves. Mint is usually all over a house. You may have peppermint extract in your cabinet, mint candies, mint gum etc. The best though is using peppermint oil (diluted) behind the ears during study and the test. If you buy peppermint extract from the store, you can add a few drops to olive oil or vegetable oil as a substitute for peppermint oil itself.
You can also use a stone to help you remember. Stones are great at holding onto information. Take a crystal or plain smooth rock, hold it in your hands and meditate with it. Think through all of the things that you wish to remember and see these thoughts enter the stone. Do this slowly and carefully. The more time you put into it and the more careful you are with exact detail, the better your results.
Then take the stone with you on your exam and when you need to, focus on the stone as you did within the meditation but instead of putting thoughts into it, open your mind and read it. This takes some practice so the first time might not work as well as the 5th or 10th time you try this. But it is one way our ancestors used to remember important things. Always use the same stone. If the stone you use does not work very well for you, look for one that calls to you. It may just not be the right one. Each stone has a different "talent". Never clear these stones! You don't even want to cleanse them harshly. Cleanse it with smoke only. And "feed" it with pure energy, such as a nice strong natural breeze (the wind being of the mind).