Have faith in yourself and your abilities. Many people think memory diminishes as they age. This is not necessarily true. Anticipating further memory loss can actually hurt your memory more. If people around you are questioning the state of your memory, you'll begin to doubt yourself. Believe in yourself and do not be so sensitive to what other people say.
A great tip that can help you improve your memory is to review information shortly after you've learned it. Doing this periodically will help you recall important things. What you don't want to do is cram. If you cram you won't retain as much information as you want.
A way to improve your brain's ability to handle tough challenges and remember things better is to spend fifteen minutes to half an hour each day playing brain teaser games like sudoku, crosswords, or electronic brain teasers. These games challenge and stimulate your brain in ways that you often wouldn't get otherwise.