Many people are occasionally concerned about whether their memory troubles are an early sign of Alzheimer's disease or just normal age-related changes. An article from the St Louis Post-Dispatch gives a great summary of the difference between normal aging and more serious memory deficits. The main consideration is how significant the information you have forgotten is. If it is something minor, then it might not be as worrisome. If you forget something that you have known for a long time, like the name of your spouse or what your car keys are used for, then you should see a physician. 

RCCS, Inc. offers free memory screening in partnership with the Alzheimer's Foundation of America to anyone who is concerned about whether or not their memory troubles are normal for their age. Whether it's just to put your mind at ease or to get the early diagnosis that is so crucial to improving later outcomes, memory screening is an important thing for people with worries about their memory to get done.