Wow! Reality sure ain't the same for everyone!
Same as everyone else has said really, you need to be far more realistic about what you ARE spending and on what.
I do a spreadsheet, I've done this for years, and review it whenever anything changes and if no changes monthly.
I operate on a 4 week month as my money comes in weekly/fortnightly/4-weekly. I've arranged for my direct debits (the ones I can change) to be spread throughout the month and come out on the days money goes in or day after (feel I'm not explaining that well) but when I was getting a monthly wage I'd arrange for them to go out 4 days after pay day (to allow for weekends and bank holiday delays).
Currently in my 'outgoings' list is:
Gas
Electric
Tv licence
Mobile Phones
Wifi
Housekeeping (that's not just food but toiletries & cleaning products, I round up and the 'spare' allows a takeaway at 'beginning' of our month)
Clothes & shoes (rarely buy for me but dd and even though not every month if it's not spent it's set aside as sure as eggs she'll take a bloody stretch the next month!)
Pocket money for dd (providing her room is tidy and no sanctions for bad behaviour)
Personal (small amount only in cash and when it's gone it's gone)
Savings (for extra costs in school hols, dds birthday & Xmas, also for others birthdays etc)
Haircuts - I cut our hair mine to save money dd as she's phobic about hairdressers (bad experience when little)
Food I get basics as far as possible (most basic stuff is fine but everyone has stuff they just can't compromise on), make soup most weeks (healthy & filling and a good way to use up veg on the turn, toast any bread past its best and use as 'croutons').
Even when I was working I'd make packed lunches (I'm veggie and shop egg or cheese sandwiches get boring) or if caught short get meal deals from the supermarket nearest workplace. Drank tea/coffee at work (usually free provided by employer or a small contribution to a kitty), would take in fruit, cereal bars biscuits in from home for snacking at work - again not just money saving but meant I had ones I liked and would eat.
I still have a load of thermal mugs from when I commuted into nearest city for work, would do myself a tea/coffee in it at home for journey in and do one at work for journey home, nobody ever minded lots of us did the same. I've a flask I used to use for soup for lunch in winter. (Workmates would often do same, not always soup, sometimes stews or pasta dishes and people would discuss/taste test/share recipes, my old boss used to do a fantastic sweet potato and roast veg stew she brought in sometimes - I miss that
)
When I've felt like my spending is out of control I use my card as much as poss, clear out my purse, get receipts for EVERYTHING and after a week sit and go through it all, reconcile the receipts with the bank transactions, breakdown items into my budget categories and see where I'm going over.
That's a hell of a lot to be spending without knowing on what it's nearly double my rent!!