You have a good memory, and this will serve you well in a variety of situations. Remember that you will still need to keep your brain active if you want it to remain as sharp as it is now. As well as exercising the brain, make sure that you provide it with a good selection of healthy foods, such as oily fish, blueberries and bananas. Fish is still thought to be the best brain food, and did you know that the DHA (Docasahexaenoic Acid) present in oily fish can help to prevent heart attacks and dementia?