I was sold at about 5:30. Basically just type M-x org-mode to begin.
If you want to create a document with a hierarchical structure: Use * to denote a heading. Use two asterisks to denote a sub heading etc. Press tab at a heading to collapse it and its sub headings so that it just shows the heading. Press tab again to uncollapse. Use M-<up arrow> to swap an item with the one above it.
To create tables: Use vertical bars to define a table. Use the meta key and the arrow keys to swap columns and rows.
Contains features for creating flexible todo lists, spreadsheets.
etc etc. Very simple to use. Very powerful. Export to HTML very simply. Export to other formats.