I came out of Uni with some debt (not massive, but had to pay for my final year myself) and had taken an extra small loan on graduation to get myself sorted for work life. I paid those both off within a year (I was earning peanuts, but cycled to work most days rather than got the bus, ate very cheaply as I had as a student, rented a very cheap room as a lodger rather than a flatshare, and didn't go out much). I also started an account in the credit union at that job, and put money into my savings as a salary sacrifice before I even got paid. It might only have been £10 per fortnight, but that added up over the months into real money rather than 1 night at the movies if I had it in my ordinary bank account.
I managed to get a slightly better job, and was able to move in with DGM, who wouldn't take rent. I still kept eating cheaply, although I was now doing food for 2 a fair amount of the time - but I also had the kitchen space, including fridge space, to do that and to make things to last a couple of days.
When DH and I bought our house, I was able to put money towards the deposit. DH put a lot more as he was a couple of years ahead of me earning and had a better job (we were engaged and planning the wedding at that stage). We had a cheap but nice wedding. We lived with concrete floors and bare walls for a number of months and did a lot of the finishing of the house ourselves.
When the market dipped a couple of years later, we were able to sell our house and get an older one but far closer to the city. We again did a lot of the work ourselves on it - my sewing machine made so many curtains and cushions in the 5 years from buying the 1st to getting the 2nd looking reasonable!! We continued to eat well but cheaply - buy in bulk, use Asian supermarkets, buy what we would eat on 3for2 offers, use coupons and loyalty cards, buy yellow sticker items and freeze, cook in bulk and freeze, make lunches to bring to work etc.
After I paid off my college/graduation debt, I basically tried to buy things for cash not on finance. So continued my savings into work-based credit union (and allowed myself 1 treat when I got a payrise, before increasing my savings again on the next paycheque as we had been managing fine on the previous amount). We could go in and negotiate on big items because we were cash buyers - and we would get good quality items that lasted longer having researched them before going near a shop. DH had a car loan for a good few years, but paid it off once he could and we started buying our cars with cash.
In the crash of 2006-2013, the interest rates were falling generally, but we still had our jobs and could keep paying at the previous rate. We had paycuts, but could make lifestyle choices to cut back again rather than keep all the luxuries we had started to allow ourselves. And told the building society to keep our payments at the old rate, putting the excess into the capital. That took 7 years off the loan term. As of this month, we own our house outright.
We only got Sky a couple of years ago when we needed to change broadband operator and they were the best option. We do check and change our utilities and insurances to get the best value (which is not always the cheapest option). We didn't have great mobiles for a long time - nowadays we have work ones, and have bought DD a decent enough one second hand. Our tech lasts us a long time before we replace, so it might be high end, but is usually not the latest models. I get my shoes mended rather than replacing straight away if a sole wears through, and will repair a lot of clothes before replacing them.
We have also both been promoted through hard work, so have got good payrises over the years. But have not changed our lifestyles totally to match those numbers - it has improved, but we still save a significant proportion.
We are not super-wealthy, but we are comfortable and have a decent cushion of savings. We had been enjoying life a little in recent years. I have a good wardrobe of clothes etc. We now have a fair amount of "fun tech" and drive 2 nice cars. We have had a couple of really interesting long-haul holidays, and fund DD doing some quite expensive sports and private school (and getting resources to help with her SNs to live life to her greatest potential).
But we still research before buying, use offers on what we are getting anyway, keep saving into lots of different pots etc. Our lifestyle is really not about spending all we have - we spend enough to be comfortable and put away the rest. And hope to enjoy spending that in a few years time when we are close to or at retirement. I still batch cook for the freezer and sew things for the house (not always, we get takeaways, buy M&S goodies, and sometimes have bought readymade curtains). We tend to go on self catering holidays and not to major resorts, as that is what suits us. We are usually too busy with work and DD to go on loads of nights out. But we are happy and feel we have a good life now, and a cushion to enjoy later too.