We don't budget in the spreadsheet sense. But we are very careful with money. We have very irregular income as we are both self employed. Well, when I say irregular, we are both in work most of the time, but if people pay you on invoices its not like getting a weekly or monthly wage.
So, I know exactly how much all the fixed outgoings are each month. In this I include everything to do with the house, car, childcare, mobiles, everything that we pay out for each month.
If its a month when we are a bit less in the bank because we are waiting to get paid, or one of us got paid and the other has a few invoices outstanding....
well our budget is to just not spend anything apart from basic food. Maybe the odd cheap thing off ebay. Oh and shoes for the boys if they have grown a bit, I don't like to wait for those.
Other months I know roughly whether we have the money in the bank to cover expenditure like clothes, having things done on the house, days out etc etc. Anything major (the only major purchase we made in the past 12 months was £299 on a tv when the 15 year old one blew up last summer!) we sort of mention it to each other and if the money is there we go and buy it.
We don't have cards, loans etc as I look on interest as money wasted. I prefer to save up for things.
On an every day in day out basis though, I just don't spend money when compared to friends. Washable nappies, childrens clothes and toys from ebay, food from lidl and netto, stock up on bargains from B&M, walk anything less than a couple of miles, no sky subscription, cook food from scratch and menu plan....
I could list for hours the things that we DON'T spend money on but bil and sil and their partners DO, and they go on and on about how skint they are.
So my point is, if you just get out of the habit of spending money, then you don't have a need to budget, cos you know that money is there for everyday things.