I'm putting together a little script where I can dump in any recurring bills and their recurrence period (fortnightly, monthly or quarterly at the moment) into a plaintext file and then run the script, passing in the date of my next payday and it'll tell me which bills are due in the provided pay period and the period ahead.
My grand plan is to add it to my .bashrc so whenever I open a terminal I get reminded of what needs to be paid each pay cycle.