"Mistakes" was the first song written by the members of Madness (Mike Barson wrote the music, then John Hasler wrote the lyrics). The song was the b-side of their second single, One Step Beyond". In the movie Take it or Leave it" from 1981, Hasler performed the song with the rest of Madness. In 1993, "Mistakes" reappeared on the singles- and b-side-collection The Business - the Definitive Singles Collection.