While the song helps to remember the specific order, in order, of the alphabet, I just went ahead and found patterns in the alphabet. Can you remember the vowels? What does the alphabet look like without them? What letters are between a and e? e and i? Which letter is in the middle of the alphabet? Knowing those answers (and others) helps break the entire string up into chunks that you can manage easily and cross reference unconsciously with the entire song memorized so you can recall the relevant information quickly and easily. The practice also familiarizes oneself with the alphabet itself overall and other connections and patterns will be recognized in an out-of-conscious manner.