I generally use a very low effort approach. I stopped believing the productivity hype a few years ago and returned to methods that preserve my sanity.

As of today, I use 4 tools:

• The reminders app for recurring things, or things with a deadline that I cannot do before/after a certain point. Think recurring payments, keeping various accounts topped up or active.
• A piece of paper with an Eisenhower matrix and short-term notes and scribbles. I recycle that roughly every month.
• Vimwiki in markdown format for long-term notes that I need to refer to.
• A journal to keep track of habits and each day's most memorable moment plus other thoughts as I work through them. Although not so much a tool for workflow, some notes from my monthly piece of paper will end up in there in a more polished form once I took the time to refine the thoughts.