See Note Taking for more details
Apple notes for quick short form writing that I may want to sync across my Apple devices. Terrible for archiving or long term notes.
Google Docs for long term note taking. Used in combination with my Timestamps tool.
GitBook for summarized notes and quick public references I want to share with other people.
Deep Thought for my contemplations.
I've been using Notational Velocity less and less.
I have my own ideas for a note taking app.
I currently use Asana, and set recurring monthly, quarterly, or yearly tasks. I use it as a reminder system as well.