Include all variable expenses now, car maintenance, electricity, heating, these can vary throughout the year you need to calculate them and come up with an average monthly amount. None essential expenses like eating out coffee at Starbucks, weekend getaways, extravagant vacations, fancy clothing, motorcycles, ATV's, if you use them, write them down, realize these are wants, not needs. Now total these all up, fixed expenses, variable expenses, and non_essential expenses,there you now have your total expenses.
You have to start somewhere and a budgeting worksheet can make the dreaded task of budgeting much easier. Whether you use computer based software or plan to keep your budget on paper, a worksheet can help you to brainstorm the categories you will need to budget for. While most of them will be slightly different than the budget you eventually come up with, they can serve as a helpful tool that will make the entire process much easie