My iTunes library is stupid

I have used iTunes for a long time, and accumulated a lot of music in that time. Some of it is stuff I've never even listened to, such as I got a CD for one song, but put the entire CD in, and then never listened to anything else. Still, it is a library that has lasted me many years, and is now up to over 3,400 items. A lot aren't even songs, but could be stand-up or a book or quotes from a movie or something. If I put shuffle on, I get some pretty crazy results. I know that I've seen this somewhere, and it seems stupid, but, well, this is an example of 20 random songs in my library.

1: I Want You Around, by Fountains of Wayne
2: PG Porn Theme Music, by James Gunn's PG Porn
3: Stay Beautiful, by Taylor Swift
4: German Cars, by Sarah Silverman
5: Am Yisrael Chai, by Schlock Rock
6: Cupid's Chokehold, by Gym Class Heroes
7: Speak To Me Bones, by Land Of Talk
8: Theory of Revolution, by A.F.I.
9: You Oughta Know, by The Killing Moon
10: Hate To Say I Told You So, by The Hives
11: Shukan Sentimental, by SCANDAL
12: Weight of the World, by Evanescence
13: The Land of Wrigley, by Stormy Weather
14: Now Get Busy, by Beastie Boys
15: Hello, by Me First and the Gimme Gimmes
16: Misguided Ghosts, by Paramore
17: I've Had Enough, by Earth, Wind, and Fire
18: Saving Lives, by Bill Murray (quote from Ghostbusters)
19: Golden Boys, by NOFX
20: The Itchy and Scratchy (and Poochy) theme song, by The Simpsons

This list was inspired by me listening to Soramimi Cake, the opening to Azumanga Daioh, then moving on to Israel's Song by Schlock Rock, then jumping again to I Wanna Rock You Hard this Christmas by the Dan Band. Three completely different songs.