Neutral tone tends to take up less space consider the same content but:

"Don't be a slob", "Don't accumulate shit", and "Don't be stupid with your space" are obvious and therefore unhelpful. You will notice your improved condition when you have that extra few feet of floor space so do Put things away.

Useful advice is more inline with: "Replace bulky items with compact travel/camping equivalents." "small linen towels instead of big fluffy bath ones that take forever to dry" (I'd never buy anything else https://www.amazon.com/dp/B00WBC17N4/) Also, things you want to store over summer like comforters and winter coats along with, bags, dishes, and so forth.