Actually, I know them all in order until I get to the minor prophets. Those guys are always getting mixed up in my head!
A few years ago, when I began doing some journaling and illustrating in my Worship Journal, I used one of the pages to "test" myself. I wrote out the books of the Old Testament several times, marking the ones I had wrong and trying again. For almost two years, I had that page in my journal when I would flip through and show examples of other illustrations during my classes and workshops. When I came to that page, I would often comment, "someday I'm going to paint over this & do an illustration on this page."
Finally, I did just that. I took some acrylic paint and covered the page, then added letter stickers, punched hearts, and an arrow die-cut, plus some flowers from a napkin to complete the page.
You can still see my lists of the Old Testament books through the paint...and I think that goes perfectly with the scripture I've included from Psalm 119.
Do you have all the books of the Bible memorized?