Conversation so far:
What was Allen Toussaint's relationship with Minit and Instant Records?
hired Toussaint as an A&R man and record producer.
He also did freelance work for other labels.
What year was he hired?
1960.
Are there any other interesting aspects about this article?
The early to mid-1960s are regarded as Toussaint's most creatively successful period.
What kind of freelance work did he do?
Notable examples of his work are Jessie Hill's "Ooh Poo Pah Doo" .
Did he release any songs during this time?
Toussaint played piano, wrote, arranged and produced a string of hits in the early and mid-1960s.
What kind of hits did he produce?
"A Certain Girl.

Question: What was he most successful at during this time?
Self-contained rewrite: What was Allen Toussaint most successful at during the mid 1960's?