I also use a physical Kanban board on my kitchen fridge with Post-its. I have four columns (To Do, In Progress, Blocked, and Done) and three swimlanes (Everything Else on top, Books in the middle, and a Recurring lane at the bottom, where some cards temporarily park in Blocked until needing to happen again). The Done column works a little bit differently from a traditional Kanban, where it's reaped on a rolling basis - e.g. I work my way down the fridge, then start replacing the post-its at the top.

An interesting feature-not-bug is that my In Progress column is capped at four tickets, physically, by the ice maker.