Memorization problems such as forgetting simple errands your Mom asked you to do this morning or scribbling on a paper, recalling what you were just about to write down are both serious signs that you need to pay extra attention to your memory and your ability of doing it, which is memorizing.
But you must realize that these simple acts of forgetfulness do happen to anybody of any age range. Due to the various and hundreds of things which a person needs to think about in a day, naturally, omitting one or two things from your To-do list could happen.
There are cases though, when these incidents happen almost too often. Like for example, a friend tells you something about what you will be doing after two weeks and you end up forgetting it or a lesson you just studied two nights ago simply slipped off of your mind as if you never have read any details of it. These are serious symptoms that show your memory could be dwindling slowly and that despite your age, because memory problems can affect anyone, the activities are exposed to could be the culprit as to how you retain important information.
Aside from what you do daily, the food you eat could cause memory problems too. The brain nutrients and for you to be able to think clearly, vitamin B and amino acids should be taken properly through the food you eat.
As for other things, if you have been depressed lately or under stress for some time now, better check on what you can do to keep your mind away from these unhealthy and unfriendly memory-causing factors. Be mentally and physically active. A good oxygen supply to the brain also helps a person in thinking clearly and logically. You can do this by leading an active lifestyle.
Mental exercises keep your mind agile to the information you need to keep solely for the brain. These could be the things that your need to remember for school. Exercising your mind with memory exercises help make it a lot easier to condition it and maintain its basic function to maintain proper thinking.
Do what it takes to keep your mind busy. Its the most natural and healthy way of keeping it stagnant which causes memory problems.