KanbanFlow - Free, fast flexible Kanban tool is still in beta but is in my opinion the best Kanban tool out there. I find that it strikes the right balance of simplicity and features. In fact the features they lack have work arounds that I think work better for your brain. If you're not familiar with Kanban, definitely give it a look. I've found it to be helpful at work and at home.
Identify Your System Before Trying to Improve It. So true. And keep it low-tech while you're figuring it out. Once you've done that, you might find electronic methods that work well to support your system. I started with Personal Kanban on my whiteboard and then migrated it to Trello once I figured out how I wanted it to work. #gtd