I'm still copying my highlights from Ourselves by Charlotte Mason into my commonplace book.
I finished Ourselves earlier in the year, but I highlighted so many quotes that it is taking me a really long time to copy them all by hand into my commonplace book.
I've finished several other books since then and I've got highlights in those books, too, that I'd also like to add to my commonplace book eventually.
But I find that I don't mind reviewing the texts slowly in this way.
It is a nice way to slow down and go back and revisit and collect and cherish and contemplate beloved ideas from the books I've read.