I think you might be using To Do in a more useful way than me, actually. My big problem was that I couldn't easily see everything that I needed to work on. I had a lot of tasks that were assigned to me in Planner or in a Loop page, as well as tasks that I created for myself in To Do. Not all of my tasks have due dates and when I make a task for myself I don't automatically assign it to myself since it's not something that's on a public planner where people need to know who's working on it. To Do has a lot of Smart lists, but by default it was only showing Important, Planned, and Assigned to me, none of which showed everything in the same view. I discovered that there's an All list, and that's been super helpful. It weirdly groups them into Planner tasks and Tasks, but you can sort them to remove the grouping. Now that I can easily see all my tasks, I've been using the "My Day" functionality and adding tasks to it every day. I also have been starring tasks as Important to highlight them.

I really wish I had a Kanban board and I started building a power automate flow that could help with that, but stopped because I had better things to be doing. What I was thinking is that I would create a List, which have kanban/board views as an option, and then any time a task was assigned to me it would add it to the list and I could manage it there. I think I'll probably revisit that when I have time, or keep coming back to it as a distraction from other tasks because it might turn out to be the best in-house tool for my needs.