I am very fortunate in that I've just moved to a supported living flat, where a main meal at lunchtime is part of the enormous rent/charges.
Even so, that rent is set to go up by 5% from April 1st (alas, my income, entirely from pensions [work pension plus state pension finally] is not) because of the risen fuel costs; when I shop for my breakfast and evening meal I find myself exclaiming silently at the price of thngs - How much for six apples???; and when my final rental expenditure has settled down, I'm definitely going to have to go back to a budgetting regime that I haven't done for years -
I call it my Tins on the Mantelpiece method:
I calculate what I have left after the DDs have gone out (direct debits, not dear daughters) and then divide up the rest into categories such as Household, Dogs, Car, Clothes, Gifts, Savings, Emergencies and others that I haven't thought through yet.
It all stays in the one bank account but mentally I've put £X in a tin on the mantlepiece for each, as for the milkman in days gone by, and physically I've created a word.doc page for each amount in and out. If it's not in its "tin", I don't spend it.
I find it a good discipline, and it really helps to keep check of what I've got, how much I've spent, and where I could cut back.