That's what the point number five is about: "Is cleaned out regularly—ideally daily, at most weekly—, so that it doesn’t become a storage area."
> deal with things when they come
Sometimes it's not practical. You can't deal with everything in the morning because you will be late for work or school. You have to push certain things later and it's ok - as long as "later" is something specific like 6 PM every weekday.