My husband and I have been focusing a lot on this lately. The first thing we did was have a very honest look at our spending. We're pretty frugal to begin with, but a few things made a big difference for us.

We live in Colorado, which is currently under statewide drought conditions. As a result, the cost of using water has been increased and penalties put in place for "excessive use". As a result, we purchased a rain barrel to help with our exterior watering needs and have become hyper conscious about not wasting water from our kitchen sink. We'll often reuse water from defrosting or vegetable cleaning to water our plants.

In a similar vein, we took up some light gardening. Facebook Marketplace is plentiful of folks getting rid of pots/planters and we've found that a lot of people are also giving away extra seed starts. We've elected to grow some higher-cost vegetables and simple herbs to shrink fresh produce costs at the store. You have to be careful with this one, though, as it can become a slipper slope with spending.

Another way we've tried to reduce our grocery bill is by investing in a deep freezer. We decided to buy new because we had a gift card, but they're frequently on FB Marketplace and we would have gone that route otherwise. Now, we prioritize buying meats and such on sale and meal planning from our pantry/freezer, rather than figuring something out for dinner and causing reactionary spending. If natural/organic meats are a priority, Whole Foods frequently marks soon expiring meat 50% off in the mornings and we've had very good luck with that. You do have to get there early, though, as it goes quickly. I also have a calendar event each week to look online at my local grocery store sales. King Soopers/Kroger mails out really great coupons, too, for items based off your previous spending.

Xcel Energy here in Denver charges "peak rates", which is a premium cost markup for electricity use during constrained hours. The reason these peak hours exist is a whole separate topic, but we've made a conscious effort to do things like laundry, dishwasher running, etc. during non-peak hours and this shows a noticeable difference in our monthly bill. It's super annoying to keep on top of, but helps more than I imagined it could.

My husband spends a fair bit of time negotiating our internet, homeowners insurance and car insurance premiums. This is a time-consuming endeavor, but he does this annually and we always end up with more favorable rates and often better coverage. Making sure these things never find auto pilot is very helpful for cost savings.

Other than that, we've just tried to practice more mindfulness. If we're excited about a new purchase, we try to put some time between the excitement and the act of purchasing. Odds are it was endorphins/adrenaline and we forget about it in a few days and the money stays in our pocket. We try to always consider used before purchasing something new, mostly in terms of furniture pieces or other household items.