"Do It Again" is a tune composed by Walter Becker and Donald Fagen, performed by American jazz-rock group Steely Dan, which was released as a single from their 1972 debut album Can't Buy a Thrill. The single version differed from the album version, shortening the intro and outro and omitting the organ solo.
Released in 1972, the song debuted on the Billboard Hot 100 on November 18, 1972, and reached number 6 on the US charts in 1973, making it Steely Dan's second highest charting single.
On the 1972 release, the song was credited as "Trad" (for traditional), although it was actually written by Walter Becker and Donald Fagen.
The lyrics are sung to a man who is addicted to nightlife. His addictions include sex and gambling. The narrator describes the realities of the man's addictions and the consequences of his actions, but emphasizes that he goes "back, Jack, do it again", implying that it is an addiction.
The original version of "Do It Again" is in the key of G minor, with Donald Fagen on lead vocals. The song uses a large amount of syncopation in the vocal melody, not particularly common in rock music of the time.
The Brazilian jazz-funk instrumentalist Eumir Deodato recorded an extensive jazz-funk orchestration on the 1973 concert recording Live at Felt Forum: The 2001 Concert. He has covered the song on numerous occasions in the studio and live. A Deodato hit collection released in 2007 bears the title Do it Again.
Waylon Jennings recorded a cover of this song in 1980 on his album Music Man. Played at a faster pace, Waylon's version of the song is shorter than the original. This version also features his distinctive guitar solo in the middle of the song.