i usually listened to sentimental songs when i think of my past relationships...like: where do i begin (love story), my heart will go on, you're the inspiration, 2 steps behind, happy ever after, i'll be there, groovy kind of love, etc... i'll smile when i think of younger times.. if i'm feeling defeated & stressed, i'll listen to classical or lounge jazz. i'll let the soft music wash away the unhappiness.