I found this great article on thenest.com (a newlywed staple):
4 Smart Spending Tips for Couples
As you all might know, Matt and I merged into the world of joint checking back in March and have been somewhat successful thus far in communicating with one another about money. I liked this article a lot because it highlights one of our favorite ways to stop from spending money... packing a lunch instead of having meals out. Matt and I both have individual amounts of "fun money" we are budgeted to spend each month. Let's not talk about how I have $5 left for May and am def going to be going over my allowed amount (isn't moisturizer a grocery item??). My point is, the majority of Matt's fun money goes toward lunches out. Then at the end of the month, he's like "where did all my fun money go?" Meals out are typically the culprit. I have tried to be more conscious of having deli meats, breads, cheeses etc. and the kind of apples he will eat (only golden delicious, which I do not enjoy) on hand at all times so he can actually pack lunch. By my estimation, this has really made a difference.
Seems like a small change, but definitely one worth making!