On page B14 of today's WSJ is a blurb about whether forgetfulness can actually be beneficial. It mentions the only known case (a woman named AJ) of someone who remembers every single detail of her life. Granted, that can be scary, but who doesn't want a perfect memory for certain things? Remembering where your keys are? Cramming for exams?
Of course, the answer is (as usual) to take what memory we have and make the best of it. Our brains are not quite what Adam and Eve's used to be. Go find a book of memory helpers or do what I do: crosswords, Sudoku, and just plain reading widely.