My mum has a white board on the side of her fridge and it has a list of what she pays out and what day of the week or month and the amount and where she pays it
so for instance
Mondays water bill, post office £ amount
Tuesday TV licence Post office £ amount
22nd of every month Broadband/phone payed online
30th of every month insurance payed over the phone
These are just examples hun but it may help you to keep track, you could always put a tick by something once payed or done etc to keep track of what is done and what still needs to be done