Going over what you have spent over the last quarter will cover most if not all of your regular payments. However, it is important to think about whether you have any quarterly, annual, or new commitments that may not have shown up in your previous search. This part of the process in making your budget should give you a list that includes utilities (eg water, electricity, gas and telephone), insurance payments, mortgage and loan repayments, and credit card payments.
The regular payments you have so far found will form the core of your household budget. You can now turn those into a formal list, either on paper or on a spreadsheet, and put the amounts into the next column, with a heading notifying the month. Before moving on to the next phase, add a further 11 columns on the paper or spreadsheet, with the headings changed to appropriate months until you have a column for each calendar month for a year. I have prepared an example budget spreadsheet to help you.