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.
If you suffer from loss of memory, be sure to see a psychiatrist or therapist. Memory loss can be a sign that you suffer from anxiety or depression, and you may not even know it. If you do have anxiety or depression, treating it could be the key to you getting your memory back.