I’ve never had the patience to go through my entire iTunes library and rate each song. But often I’ve wished I could play a party shuffle with my favorites. I have created particular mixes, but unless I change these mixes often, the same songs play. AutoRate is software that automatically rates your songs based usage. So when you play a party shuffle based on ratings, it will choose your mix based on what you tend to listen to most.
Check it out: AutoRate