But for personal stuff, fitting everything into one work flow is fine. If folks are wondering how to use Kanban for personal needs, I currently have 7 columns:
Dumb ideas: 62 cards
Backlog of Doom: 100 cards
Not Yet: 38 cards
Weekly recurring: 8 cards
Doing: 4 cards
Review: 4 cards
It Is Done: 1 card
Dumb ideas is a holding tank for wild ideas, usually low priority or high risk. To pick a few examples: trial adopting tiling windowing managers, buying an IPv4 block, and terraform for social media profiles are all on there. Also: "self-hosted Trello alternative." Basically things go here so I can remember I decided that idea was _not_ a good one, so I dont get into any "I thought I had a card for this" create-delete-create loop.
Backlog of Doom is your standard backlog. Lots of video games, books and software projects here.
Not Yet is basically a way of hiding things that are scheduled for later. This is almost entirely TV shows awaiting new seasons, but also a few tasks filing taxes, selling shares etc.
Weekly recurring is essentially a tighter loop of that, plus some information gathering tasks ("look for new books at the library on $topic", "review the top posts for the past week on /r/$subreddit".
Doing is as expected.
Review is a catchall for things that benefit from double checks -- financial transactions, followup communications with insurance, etc. If I wanted I could also use it for book reviews.
Done is as expected, but has a butler cleanup task to archive cards.
I've also got labels for Games, Shows, Reading, Money, and a few others.
Same principle holds for layers (of management, abstraction), levels of indirection etc.
Also: I have most bills on autopay, and transactions created 90d in advance in GNUCash. I do also have piles of mail in the form of a filing cabinet and labeled folders. I've actually been experimenting with letting the mail pile up in an inbox and filing it away once a month just to prove to myself the system works enough that I don't have to monitor it daily.
An interesting feature-not-bug is that my In Progress column is capped at four tickets, physically, by the ice maker.
So far it's worked out OK but I feel it's because I am the primary user. When the kids get older or to get the SO to use it more I feel we might need to come up with private sections, or color code the cards or similar and change the in-progress rules. It's still a very fun physical activity kind of like browsing books at a brick-and-mortar store or library.