[O] Where to keep draft work?

[SabreWolfy]

Consider the following Org file, which is used to generate an Agenda:

--8<---------------cut here---------------start------------->8---
* Write the big report
  DEADLINE: <2015-05-26 Tue 12:00>
* Write the small report
  DEADLINE: <2015-06-02 Tue 12:00>
* Plan the draft proposal
  SCHEDULED: <2015-05-28 Thu 09:00>
--8<---------------cut here---------------end--------------->8---

Where is the best place to store the actual text of the reports and
proposals? Should it be stored under each heading? Or in a drawer? Or linked?

I call the Agenda and see entries for the day, and then scroll to one and
press <Tab> to jump to it. This would be a good place to store the text?