A great tip that can help you improve your memory is to seek help if you're suffering from depression. Depression can do a number on your brain. It can make it hard for you to concentrate and remember things. Getting proper treatment can help you improve your memory.
If you feel that your memory is suffering, try to reduce stress, anger, and especially depression in your life. One of the primary symptoms of depression is actually an inability to concentrate, which makes it extremely difficult to acquire and retain memories. See a professional if you think this could apply to you.