org-mode works well enough for me. It's a bit awkward at first and requires you to remember a lot of key combinations and things, but it does the job.
It doesn't work so well across devices (especially mobile), so I tend to carry around a small notebook, and then when I'm back at my computer I type anything useful that I'd captured in my notebook into org mode.
Sometimes I just take a picture of my notes in my notebook and then use the inlineimages feature to display the image inline, that works pretty well too although there's no OCR.
It doesn't work so well across devices (especially mobile), so I tend to carry around a small notebook, and then when I'm back at my computer I type anything useful that I'd captured in my notebook into org mode.
Sometimes I just take a picture of my notes in my notebook and then use the inlineimages feature to display the image inline, that works pretty well too although there's no OCR.
It seems to work OK.