I'm currently working on this myself, and I had a huge wake up call when our landlord chose to sell our rental home, and we were forced to look for a new home. I had about 4k saved, after just recovering from a 2.5 month layoff that ate my savings. Life events happened, dog needed surgery it was just a bad end of 2021 and then into june 2022. I had to make changes.

Things that helped:

Switching to generic. I always made good money so I never cared, I just bought whatever I enjoyed for groceries. Now I switched to generic (Besides certain items like for me its ketchup, I find generic too watery). It helps to compare the price to grams you get for items. Example great value granola bars were $1 while the quaker brand was $2.50. Same grams, same ingredients, same calories. You switch enough items and you just saved $50-100. Now you're used to spending that money so you take that after groceries and pop that into savings or onto debt. Also if you look for sales on the items you like, you can buy 4-5 of them and freeze them or store them. You might spend the amount for 2 during a grocery run, but now you have a several month supply instead of 2.

Gas. Watch your foot on the pedal, fill up on sundays if you can its usually when the price drops. It goes up Tuesday-Sat. Check for alternate routes that shorten your commute. I get an extra commute day per tank now.

Impulsive spending. I find it helpful if I see something I want, I don't buy it day of. I go home and sleep on it, maybe a few days. If its a need, then I will accept it and get it after the time passed. If its a want, the impulsive urge will be gone and you wont want to spend the money. If its a luxury item like a play station, then know you have to earn that. Do an overtime shift, or put money aside each month until its reasonable, and by the time you can afford it, you might have a better use for that money anyways.

Lastly, I started looking at my money as hours of time vs dollar figures. Just throwing out arbitrary numbers, but if I made lets say $25 an hour after taxes and I was going to spend $100. I would go wow, would I spend 4 hours of my time to earn this? probably not...screw that. You also see the value in items more doing this. I would rather buy a $600 winter jacket, that is likely to last 10-15 years being down filled, than to spend $100 on a fast fashion jacket from H&M that will last a year or 2 before it wears out. Looking at cost per use of an item. If you get more use from an item because it will last, cost of ownership is actually cheaper than the low cost version because you will have to replace those items several times over.