In the summers I am outside working at a botanical garden. In the winters I cross country ski. I keep a Rhodia Wirebound A6 Dotted Notepad and pencil in my back pocket to capture thoughts.
For night time thought capture, I use a diction app on an iPhone. Several of these apps transcribe to text. I suppose there are ways of automagically getting these transcriptions into a vault, but that rabbit hole is for another day.
I gleaned much from this discussion, particularly those four color pens.
Cheers!