I was having a conversation with my sister a while ago about how awesome the genius on iTunes is. Not only are there little pre-made mixes (like above), but you can choose any song from your library- that the genius has data for- and the genius will make a mix for you based on that song. I find this more handy than the shuffle option since all the songs in the mixes have a more logical flow. With shuffle you go from a Disney soundtrack to B.I.G. in like, 2 mins. Also, (if you are like me) its a good way to hear songs that you might not have heard before in your library. I usually have a few certain albums that I go to when I want “calm down” music, or music to clean my room to. But the genus digs up stuff I never would have thought to listen to.