"Let a Good Thing Go" is the second single by Irish singer-songwriter Gemma Hayes, released in 2002 on the Source Records label.

Two versions of the single were released – incorporating slightly different covers.

All songs written by Gemma Hayes.

1. "Let a Good Thing Go"
2. "Hanging Around" (acoustic)
3. "Pieces of Glass" (radio session)

Also includes video for "Let a Good Thing Go" (Directed by Sam Brown)

1. "Let a Good Thing Go"
2. "Summers in Doubt"
3. "Ran for Miles" (home demo)

1. "Let a Good Thing Go"
2. "Pieces of Glass" (radio session)