Only eat in restaurants once or twice a week.
Use coupons for groceries, restaurants and entertainment.
Plan errands together to save gas.
Ask the bank for deals to get higher rates (altough right now the rates are so low it barely makes any difference, but for many years it did, and might again).
Use my credit card for everything, always pay in full at the end of the month, get back money on a department store card, and free flights on others (also, back in the day this earned $‘s, because the money stayed in your bank account an extra few weeks before paying for what you bought. I probably made a few thousand over the years always using my credit cards, not even including the free flights).
We never drink alcohol, well never is too extreme, when we have people over we have alcohol for them, but that is very rare, and my husband probably has 6 beers a year, maybe some Baileys in his coffee 6 times a year, but basically never compared to most people we know. Especially out at restaurants or bars we have probably ordered a drink 10 times in our 18 years of marriage.
We don’t buy a lot of clothing. We repair our clothes if we can. My husband just darned a few pairs of socks, and I told him he is being two extreme.
We resole good shoes rather than buy new ones.
Also, when we eat better we spend less on food, because we are eating less. I have never actually calculated the difference, but I bet we save about 10–15%. Some healthy foods are more expensive, but the quantity I buy of everything is cut back.