Marie Kondo follows up The Life Changing Art of Tidying Up with the illustrated guide Spark Joy. I found Spark Joy to be more helpful than the first book. It's still filled with some woo-woo ideas about what makes inanimate objects happy, but also some practical advice.
What frustrated me about Life Changing Art was how she glossed over the category komono (miscellaneous). Other than clothes, papers, books, photos, and sentimental objects, everything else falls into this category. That's a pretty broad category! Spark Joy gives more detail on how to tackle things like dishes, bathroom items, electronics and the like. She also provides ideas about how to store all the things that "spark joy." I actually rearranged my closet with these ideas in mind. There are also illustrations for her folding method.
I'm not sure if Marie Kondo was addressing some criticism, but she does seem to emphasize that she doesn't want people to throw out everything they own. Even though this seems to be her own goal. There is some cringe worthy examples from her own life, however.
"I have bid farewell, at least temporarily, to countless things that didn't bring me joy and, to be frank, the absence of a discarded item never caused a catastrophe. There is always something in the house that would serve as a substitute.
...After discarding a hammer because the handle was worn out, I used my frying pan to pound in any nails."
Nooooooo! This would be a divorce worthy offense in my house. Using my frying pan, an expensive wedding present, as a hammer? No. Lady, buy the right damn tool for the job.
I think if you are Konmari'ing your life, Spark Joy would be a nice addition to your decluttering library. If you find Marie Kondo a little much, maybe you could try Claire Zulkey's recommendations instead.