I don't press the send button, so my drafts folder is basically my notes folder(I also use gmail for notes). I have access to them from my cell ph, laptop, tablet, etc. and i can easily drag files onto the note so they're attached to the note. If I'm at a friends place & don't have my device w/me, I can get to all my notes from their pc.
I also use GoogleSheets when I need a little more power (formulas, cell formatting, etc.).
When i'm offline i use vi or notepad, depending what OS i'm on.