Tip: open your bank or card app and scroll back two months. Anything that repeats belongs on this list. No bank login needed here. How to cancel and negotiate bills.
Each subscription gets a repeating calendar event with an alert at 9 AM three days before it renews. Free trials get an alert the day before they end.
For each one, ask: did I use this in the last month? Would I sign up again today at this price?