Funnily, 5 years ago I developed my own personal kanban tool. It's still running on http://multikanban.com Of course Trello is a thousand times more powerful and polished. I was just sharing to show that I had my "personal kanban" phase in the past. It worked for some time... but for some reason I stopped really benefiting from it. The idea was to have multiple kanban boards easily accessible, where each board would be a project. "Todos", "Money", "Family", "Refurbish motorcycle", "Code projext X", etc. Of course it worked nicely for specific projects since it helps you be very critical about what gets done and what doesn't. But I think the problem I experienced there is that basically I ended up working on a single project, two at best. Like they were top priority and they never got finished, so I missed on everything else. I still have this problem now, that's why I try something different like having specific times of the day/week allocated to "main project", "sideproject", "money", etc. I just feel that the more thought I put into it, the more complex the system becomes, the less likely is it for me to follow it through.
I did https://everyday.app to sort of define a schedule of habits I want to follow through every day, and so I feel progress in all directions I want to work on.
Thanks for the book recommendations :)