"Peace of Mind" is a song written by Tom Scholz and originally released by Boston on their debut 1976 self-titled album. It was released the next year as the third and final single from the album. As a single, the song peaked at #38 on the Billboard Hot 100 chart in 1977. The song is about the people Scholz worked with at Polaroid Corporation before getting his recording contract, and about the fact that Scholz wasn't interested in climbing the corporate ladder into company management. It is one of six songs Scholz worked on in his basement in 1974 and 1975 before Boston got its record contract, five of which eventually appeared on the Boston album. The demo was specifically finished in 1974. The drum parts were originally developed by Jim Masdea, although Sib Hashian played the drums on the official release.
"Peace of Mind" is a downloadable track in the Xbox 360 and PlayStation 3 releases of the video game Guitar Hero III: Legends of Rock, as well as the video game Rock Band, both as master tracks. However, many of the guitar and vocal harmonies heard throughout the song have been removed from both games for some unknown reasons.