As if you needed another excuse to exercise, physical activity enhances the effects of helpful chemicals within the brain and actually protects brain cells! Exercise is one potent weapon in improving your memory or maintaining more of it, as you get older. So keep active, keep moving and keep more in memory!
Try to memorize things in sets of 7. According to studies, the human capacity for Short Term Memory, or (STM) is 7, add or minus 2. This is why humans memorize things best in groups of 7. This is also why, for example, your phone number is seven digits.
Use planners and calendars. A day planner is a great place in which to jot down things you need to remember. Make yourself a schedule and look at it every day. The more you write things down and view them, the easier they are to recall on demand. You brain is taxed enough during the day, and writing things down often has the effect of reinforcing them in your mind.