Paul McCartney wrote about 'Yesterday,' still one of his most popular songs. In 1999 BBC acclaimed it to be greatest song of the past 100 years. I'm sure there are contenders for that title but that is not my purpose for mentioning two more songs. They are 'Today,'' words and music by Randy Sparks and made memorable by the New Christy Minstrels and by John Denver; and 'Tomorrow,' by Quvenzhané Wallis, written for the musical, "Annie."