Some years ago I had sent a mail on this subject (Feb 6 2009).  I fished it
out and was editing it (below) and then see that Eric Abrahamsen has said
most what I wanted to say.

Anyways Ive kept the subject list below and want to add only this much:

People come to org for different reasons/needs/inclinations.
It is definitely worthwhile clubbing these diverse/contrasting ways into a
few (5-10?) foci/approaches

My subject list

* Publishing
** Web
** Latex
** Doc

* Brainstorming

* Managing My Data
  own private hyperlink system

* Time/project mgmt
*** Agenda
*** Time tracking
*** GTD
*** Journalling

* Tables and spreadsheets
* Programming (Babel)
** Literate programming
** Reproducible research
** Meta Programming