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 can easily create your own budgeting worksheets by accessing free worksheets online and then customizing them to your specific needs. This is one area where you definitely don't need to pay money unless, of course, they come with a software program you purchase. However, if you just want to make a list of your income and expenses that you will use to create a budget then you can find plenty of free examples online.