To improve your memory, take a good multivitamin. And, be sure to get at least 100 percent of the daily requirement of Vitamin B-12, Vitamin B-6, folic acid, Vitamin E, zinc, and lecithin.
Play a memory game, like Concentration, daily.
Use your brain more. Take up crossword puzzles, scrabble, solitaire, etc., to exercise your mind.
Get enough sleep, and exercise daily (physical exercise keeps the mind in good working order).