Page Layout ⇒ Keep whole section on the current page, break if necessary

[Aerow]

Hello everybody.

My problem states as follows:

I have a document with a huge amount of subsections (>300). Regarding aesthetics, I am trying to achieve the following:

If a particular section fits wholly on the current page, put it there. If not, perform a pagebreak.

I couldn't figure out a method to measure the lenght of a given section beforehand, e.g. to use the needspace-package afterwards.
Is there any possibilty to perform that kind of task?

I am very thankful for any help regarding this.

[EDIT: I also tried to figure out if the use of floats would be of any help. But some sections have a lenght of more than a single page, so the option to automatically break the page must not be lost.]