When one says "I'm all set," it generally means that they are prepared or ready for whatever is to come next. However, there are many other ways to express this sentiment. Saying "I'm ready to go," "I'm prepared," or "I'm good to go," would all convey the same message. One could also say "I'm fully prepared," "I'm ready and raring to go," or simply "I'm set." These synonyms can be used in any situation where someone wants to express their readiness or preparedness. So the next time you want to convey that you're all set, consider using one of these alternative phrases.