I did not use much of what I took but we had the I-pod going stocked up with songs that meant something to us (or I liked). While I was oblivious to it I did remember it stopping and asking DH to restart it. Also as DS emerged into the world Mama by Il Divo was playing and it was the song that we played at MIL's funeral and it seemed perfect, like she was with us.
I also used a heat pack (supplied by the hospital) for a lot of it.
I actually found laboring on the toilet really comfortable for a huge chunk of it.
Other than that, I was just lost in my own world doing what I had to do.