Unpopular opinion: Packing my own lunch every day saved me HUNDREDS last month

I was spending way too much on takeout from places near my garage during breaks. It felt easy but the costs were sneaking up on me. So I began preparing all my lunches at home on Sundays, just simple stuff like sandwiches and leftovers. After one month, I counted up the difference and it was over $200 still in my pocket. That money is now going straight into my emergency fund, which feels AMAZING. Has anyone else tried a small switch that added up to big savings?