Hi there, I'm glad you enjoyed this piece! :)
I have one single Idea board where I collect all ideas and sources of inspiration that might lead to articles I write. I have a (really long) list called "ideas" where I put everything that comes into my mind and a list called "asap ideas" with topics that I want to cover quickly. But I also have a list called "For Later" where I collect ideas that are for a very specific time during the year. For example, if I have an idea for a post that would work well at the end of 2020, I put it here and set a reminder.
Other than that, I have lists called "started writing", "Written", "Submitted", and "Published" and I basically move the cards through the lists during my writing process. By doing so, I always have a good overview of the pieces that I'm currently working on + I know how many I have submitted etc. :) Hope this helps! :)