When is memory loss cause for concern? Possible signs are forgetting common words and using odd ones in their place, asking the same questions repeatedly, becoming lost in familiar places, mood swings, misplacing items in odd places… In these instances it is important to seek medical help sooner rather than later in the event it is Alzheimer's. However, simple forgetfulness could be the result of fever, dehydration, vitamin deficiency, poor nutrition… To sharpen the brain experts recommend memory games and crossword puzzles. To boost your memory, post a large calendar to record appointments and make a to-do list.