Start by determining your fixed costs such as rent/mortgage, utilities & transportation. Set aside a portion of your income for essential needs like groceries & healthcare. Allocate funds for debt payments & save a portion for emergencies & future goals.
Consider setting a limit for discretionary spending on non essential items like entertainment. Regularly track your expenses, identify areas where you can cut back & find easy ways to save money like cooking at home or using discounts. Obviously save some for yourself to enjoy life too.
setting limits, allocating is more difficut if your doing it al from one account because those limits are just fictional limits that just involve brain decisions. and most people who have issues budgeting do not make good decisions if all income and all expenditure is done from the same account.. the best way is to actually physically separate the budgets over different accounts. that way people cant be tempted to over spend on wasteful things whilst ignoring the important things..
EG imagine you get min wage ~£$1600 a month knowing (i chose non-particular random numbers)
rent/mortgage is £$900
electric is £$80
gas is $80
water is £$40
put £$1100 into bills account
now you have £$500 to split up for consumables. so set a budget for your groceries, kids school clothing and etc
and put that into another account. and that accounts card is the only card you use when you go to the grocery/clothing store
and then whats left is the waste money to do with as you please.
once you have this set up. then you can find ways to modify your expenditure or income to compensate your needs more wisely