My DH earns 23k basic but does some extras and I do some babysitting so our combined salaries over the year usually bring us to around 27k.
We are just very careful. We rarely go away, only generaly a week in the uk every couple of years but do try to go and visit family and combine it with cheap travel lodge stays a couple of times a year.
Clothes wise I buy from supermarkets and some second hand. I sell any decent clothes on.
The children don't get many toys and presents outside of Birthdays and Christmas but then they don't need them really. We manage to buy decent presents on special occasions - spend around £100 per child.
I am very careful with food, do a food plan each week based on what we have in and then shop the offers in supermarkets in preperation for the next week. We try to grow some fruit and veg and look locally for useable produce - ie we will pick blackberries in the next few weeks and make pies and freeze.
We both drive cheaper cars, a nissan almera for me and a fiat multipla for dh. Cheaper to run than big mpvs which we had before, and were impractical.
We only buy houses that are cheap and renovate to keep mortgage costs down but help us to move up the property ladder.
We look locally for cheaper days out, local councils run great activities so the kids still have fun at a fraction of the cost. We use tesco points for days out, look out for 2 for 1 tickets etc.
But we generally manage pretty well and it is fine! We have laptops, sky, broadband, decent clothes, are well fed, pay our bills...