She and I spent a while cleaning and organizing this wreck.
Because... she was moving into my room! And there was no way we were going to move all that stuff into my room and dump it on my floor. She moved in the next day (Elisabeth moved in with Amy). And ever since then, the room has stayed nice and clean! True, I have not allowed a day to go by without getting any mess be straightened out, but that is the point of this post. I would like to share some things I have learned about helping a messy little sibling keep his/her room clean.
First of all,
be kind. Emily does not want to listen to me if I am yelling at her and
telling her to "pick this up, now pick that up! Come on Emily, move faster!" No, I have to do it gently and kindly, with a smile in my voice (and on my face, too!).
Secondly,
work with your sibling. Don't be a slave driver. I help Emily clean. Perhaps she will put her clothes away while I make her bed, or vise-versa. True,
she was the one who made the mess, so it is not my responsibility to clean it up for her. But in a family, we have to work together. And it really is a lot more encouraging to have someone working with you, not just telling you what to do.
Thank and praise your sibling when he or she finishes. Give a hug. Emily loves hugs.
Don't say things like "You are such a mess." "Come on, I have other things to do today than watch you clean." "Won't you
ever learn to be neat and tidy?"
Do say things like "Good job!" "Isn't this a lot better?" "You're a good worker." "I love you."
Remember to work with them daily otherwise the task will become gargantuan, discouraging both you and your sibling. And your parents.

I also just realized something yesterday. I need to train her to recognize the mess, and then clean it up on her own without me telling her what needs to be done. It will take a little longer, maybe, but I will have to stick with it until she can clean her room quickly and effeciently. Better yet, I'm hoping eventually she'll just
keep it clean, and then we won't have to keep cleaning it again every day!