The most seamless capture-from-anywhere workflow I struck upon is to have a shortcut on my phone's home screen. When tapped, it takes my dictation, transcribes it, and saves it to an inbox.org file with an org-syntax timestamp, synced to my main computer.

Basically the notes have the same format that org-mode uses to save notes placed in the logbook. But you can also make them as individual TODO headings or whatever. It's all plain text anyway.

I try to empty the inbox.org every morning, I typically have 20-30 entries to go through. Some things matter and are revised and refiled appropriately. The rest gets dumped into a chronological log file for just in case.

edit: btw, it would be cool if I also made a version that would append the content of the phone's clipboard to the transcription, so that I can also catch links and/or bits of text. Or maybe even multimedia, thought I am not sure how I would accomplish that.