I have tried many, many ways to stay organised and to capture my thoughts. One of my main issues is getting myself to actually look at what I've written down. I have a tendency to let things disappear into the background and click off reminders without even realising. I also love s physical notebook but it takes a lot to get into the habit of checking it daily.
One of the things I am trying is making my phone itself a dashboard for organisation using widgets. On my front page here I have a todoist widget and a small view of calendar. On the next homepage I have just one big Google keep note widget which I'm using as a brain dump for when I get random stressy thoughts in my head/ things I need to remember and deal with later. I also have a full monthly view of calendar as another widget on another home screen.
I really like it, especially the calendar but it is not foolproof. I am finding that im already ignoring the todoist list and still going back to Google keep which is one of my favourite apps for thought capturing.