"Cast your mind back" is a phrase commonly used when trying to recall a memory or event that happened in the past. However, there are several synonyms that can be used in place of this phrase, such as "reminisce," "reflect," "remember," "recollect," "harken back," and "recall." Each of these words carries a slightly different connotation. "Recollect" suggests a more deliberate effort to remember, while "reminisce" implies a sense of nostalgia and fondness. "Reflect" suggests a more introspective approach to memory recall, while "recall" is a more straightforward term that could be used in any context. Regardless, all of these words ultimately mean to bring a memory or event to mind.