How do you efficiently budget your monthly family income? How do you know the right amount to allot for each of your expenses? any suggestion would be a great help! :)

I have a list of the monthly dues like electricity, water bill, phone bill, internet bill, car loan, etc. Then on top of that I have the budget for our groceries and food if we want to eat out. Other miscellaneous like car repair, check ups, meds, etc. And of course, don't forget the savings. Try to save as much as you can. :)