"Snapping to it" is a phrase that means to start working diligently or quickly. There are many synonyms for this phrase that can be used interchangeably depending on the context. "Getting down to business" is one such synonym that implies a serious and focused attitude towards work. "Getting cracking" is another synonym that suggests a sense of urgency and the need to take action immediately. "Buckling down" is a synonym that emphasizes the importance of concentration and perseverance. "Turning on the heat" and "getting the ball rolling" are also useful synonyms for "snapping to it" that convey a sense of momentum and progress.