Depends on what you mean by a better standard of living. I don't think we'd be classed as having a good standard of living but we're not in any debt so I'm happy to share my tips:
No monthly contracts. That means no satellite TV, no phone contracts. The only contract I do have is broadband. We use pay as you go on the phones, getting free texts for a month and then I top up a tenner which usually lasts another month (2 for dh). So £5/£8 a month on phones.
Budget shopping. If I have time I'll buy tinned stuff, veg, fruit, etc from Aldi and the meat from the reduced meat section at Asda in the morning.
Loyalty cards. I have a Sainbury and a Coop loyalty card and I'll save up the points each year to use towards Christmas.
Bills. We don't have the heating on at night or when we are out of the house and radiators are off in rooms we don't use. We have an open fire so we light that in the evening. I pay £59 a month for both electric and gas.
Mortgage. We overpay every month by agreement to try and pay it off quicker. If I ever have more money left at the end of the month I'll put it into the mortgage. The quicker you pay it off the more you'll save in interest.
Second-hand. Nothing is new. People still get rid of lovely stuff that you'd pay a fortune for in the shops. The kids both got stunt scooters for Christmas that were second hand, I just purchased new gripper strips and handles for them and they looked as good as new. Same with clothes, furniture, etc. If we need something then I'll try and get it second-hand.
Food. I make my own bread, cakes, etc and can save a fortune on packed lunches by using leftover pasta to make a pasta salad, leftover stew can go into pastry parcels, leftover curry makes a good curry wrap, etc. Pies cover everything and are brilliant for leftover meat.
Can't afford it? Then we don't get it. Nothing is worth getting into debt for.
So we live according to our means and even have enough leftover to treat ourselves to the odd meal out or weekend away. I know that our joint income would see us regarded as below the average wage for one person, but it makes no difference to us because of our spending habits. We probably have more disposable income than people on much higher incomes because we are careful with our money and are well trained in making it go further.