Set a budget for the year every January which includes all expenditures/bills, monthly discretionary spending, travel and retirement savings in retirement and taxable accounts. Once the budget is set....we follow zero based budgeting....every dollar has a place to go. The only two categories we track is monthly discretionary and grocery spending. That's it.
If we're under for the month, the excess goes to the emergency fund. If we're slightly over...we'll roll over to the next month, or pull from the emergency fund depending on the expense. It works...we've been doing this for years and years.
I have followed a similar setup for years, from way before there were computers to make it easy. It’s one reason I haven’t had to panic yet about being out of work. One of the categories under savings was a line item called Unemployed, where I saved up money to live on if I lost my job. Every dollar, including any overtime when I was working, was fed into the budget and assigned a spot. I actually have a formula set up in the budget where I plug in the number of hours worked and it calculates the net paycheck after taxes, so I can put the OT in before I get the check. I usually set up my budget for the following year beginning in July, so right now I already have the spreadsheet for 2023 set up and populated with the correct line items and estimated costs. It will be nice when I can also add income to the spreadsheet . . .
As far as rules for money, I save first and buy later, no debt whenever possible. I don’t have any debt right now, and that has been a godsend during long term unemployment. I only use a credit card when necessary, and pay it off at the end of the month. I always cover necessary expenses first, savings second, and discretionary (fun) third. I actually find I have more fun money living on a budget than I did before I started using one, because I am planning ahead instead of playing catch up. I prefer to own, not rent or subscribe. Don’t buy the cheapest, but don’t buy the most expensive either - buy quality goods that are worth their price and will last. Don’t buy in excess of what I need - for example, I have three pair of shoes instead of a closet full and I buy clothes that are classic instead of trendy, so they can be worn for many years without looking dated (and buy at the end of the season on sale if possible). Make a list for grocery shopping using the sale flyer and stick to the list. If I can buy store brand groceries without sacrificing quality, I will (Publix store brand products are generally good, although I don’t like their strawberry jam so I buy Smuckers).
I know it sounds like I am always looking to spend as little as possible, but that’s not completely true. I look to cut costs where it won’t be noticed so I can use that money in other ways, like travel. I don’t have any kids to worry about leaving an inheritance to, so the optimal goal is to live well but within my means.