To your list I would add, do a clean-up every so often
It feels good to go through your posts sometimes and put away in the archive those ones that now don't look so appealing. I had to do a lot of posts to get a grasp of how IG works. Now I retired like a quarter of them
I don't know if it really worthed it for the algorithm, but it seems like it adds attractive, as when you retire old pieces from your portfolio