To “start off on the right foot” or “get off on the right foot” is to begin an activity, project, job, or relationship well. To start on the wrong foot is to begin badly. “Put your best foot forward” means show your best self or make a strong effort. The source attributes the right-foot good-luck connection to a reported superstition, rather than establishing it as a certain origin.
Cultural note: These phrases are common and usually positive. “Put your best foot forward” can mean making a good first impression, but it can also mean making a sincere effort—not pretending to be someone else. Treat the superstition-based origin as an explanation some experts suggest, not a verified fact.
Keep exploringA small image about feet helps speakers describe how a new job, meeting, project, or relationship begins.