R.J.
Deep Freezer.
Food costs here are through the roof. $12 a pound for lunch meat through the roof. $20 per # for cheese. When things go on sale (Turkey, $8-10 per pound down to 33 CENTS per pound? I buy 6-12 turkeys. Roast every month or every other month. Voila. Dinners, soup, sammie meat, etc. Ditto corned beef $11 per pound, on sale for $3 per pound, etc . ONCE a year, I buy a lot. Chicken thighs just went from 9p# to 3. Bought bags and bags.)
Similarly, I shop regularly at 5 stores. Milk = $4 per half gallon everywhere but WholeFoods & TraderJoes. There it's 1.59 per half gallon. Done and done. Day old bread from the bakery for $1, versus bread for $4.59 at Kroger/QFC/Target/etc.
I only eat out if it's cheaper to eat out (like phô) than to make.
I rarely drink. Although I LOVE wine, I drink that even less (although I went on a $10 bottle mission a few years ago and found some GOOD ones. Aussie, South Africa, etc. even still... A bottle of wine is 4-6 glasses, and should be drunk that night. A bottle of hard alcohol has dozens or even a hundred or more servings, and keeps for years.
DIY everything... And trading/bartering for either what I'm not good at OR lessons. Our lowest bid on our fence was 5k. Cost 300 to build. New kitchen cabs = thousands. Cost me less than $100 in trim and paint to reface. Hardwood floors? Bought demo'd Beeche for $200 (enough for 1000 square feet. Saved thousands there, and a $75 bottle of scotch, a pizza, and a 6 pack of beer bought me the instructor and use of his tools for installing. Seed over sod. Cedar chips over play chips. Glass cutter and cannibalized frame ($8) instead of $200 floor length mirror.
Tomato seeds ($6) for 50-100lbs of tomatoes instead for $2.99 per pound. Herb garden instead of bought herbs. Homemade sauce instead of bought sauce.
Expensive sturdy clothes that last for years (or are grown out of) over cheap clothes that need replacing in a few months.
Netflix & hulu+ (less than $20) versus $100+ for cable.
Cellphones over landlines (1/8th the cost)
Preventative healthcare over emergency/acute care.
Massage over imatrex (both work for my migraines... Even out of pocket, massage costs less than imatrex, and insured??? $20 a month for massage).
Snowboarding over piano ($50 per month for 2 people, v$159 a month for 1 person).
Previous Gen electronics.
Hand me down electronics
Pawnshops for name brand power tools (hey... Can even sell back instead of storing!)
Grant & scholarship writing for school.
Airmiles & deals for travel. Ditto hostels and staying with friends/family.
Courier work for miles (airfare)
Drive away (or similar company) for road trips
Hunters or butchers over stores. 1/8th of a cow over 'individual servings'
Dish soap + water = foaming hand soap refills