Here is my budget template. I update mine at least once per week.
I go through my bank account and check all of the direct debits I am expecting against what is budgeted for and I also go through my bank accounts and credit card accounts online to check what I have spent. I write next to this if it is a ‘need’ or a ‘want’ so I can see what I am spending unnecessarily, in order to keep myself in check.
This is what works for me and it might work for you too. I think it is a simple spreadsheet to use but interested to hear your feedback on how it is helping you (or not!).