"For a change" is an expression typically used to suggest doing something different or taking a break from routine. There are several synonyms that can be used to convey a similar sentiment. "Switching it up" or "varying the routine" both imply a desire to do something different than usual. "Breaking the monotony" suggests a need to add some excitement or diversity to an otherwise dull situation. "Trying something new" or "exploring different options" both emphasize the idea of stepping outside of one's comfort zone. Ultimately, whichever synonym you choose, the goal is to inject some freshness and excitement into your life.