There are various things you can do to improve your memory such as
Write things down you need to remember, when you physically write something it stores better than just hearing it. Make post it notes for yourself in places you will see them. When you hear something you need to remember repeat it a few times to yourself or make a ryhme out of it. Studies have also shown that highlighting things with neon colors or using neon paper helps us remember things written on it better.
well one effective way is to go over something constantly. like for example, notes go over them every day, and soon it will be in your memory very well where you can recall info months or years later. but that takes time. once you actually remember something or should i say learn something, if you dont go over it every so often you will forget it.
read,play,rest cos every 2hrs u slip d brain gets 15min rest n eat.
Get enough rest and get the vitamins and proteins your body needs.