There are many different ways to express the idea of going with the flow. Some similar phrases might include "letting things be," "riding the wave," "following the current," or "rolling with the punches." Other possible synonyms might include "going along with the crowd," "dancing to the beat," or "going with the rhythm." Depending on the context, you might also use phrases like "letting life happen," "relaxing into the moment," or "embracing change." Ultimately, all of these phrases suggest a willingness to be flexible, adaptable, and open-minded, and a desire to approach life with a sense of ease and acceptance.