Behave Yourself (1918–1937), by Marathon out of Miss Ringlets (by Handball), was an American Thoroughbred racehorse.

Compared with Black Servant (a Blue Grass Stakes winner) Behave Yourself was a mediocre racehorse, only winning four races in his career.

[2] It was rumored that Edward R. Bradley was unhappy that his horse won because he ultimately lost money on the win (by betting heavily on Black Servant instead).

Behave Yourself was not considered a good sire, but he was rarely given the opportunity to breed because Bradley thought he had poorly conformed legs and did not want the trait to be perpetuated in his offspring.

[2] Bradley donated Behave Yourself to the United States Army cavalry remount service in 1930.