To display the content of a page in the right column, enter that page's id [see note below] down in the "Page Notes" field towards the bottom of the page admin. You can have multiple blocks showing up by entering a list of page id's separate by a comma...
eg: 12356, 13285, 15342
That would show the content of those three pages (in that order) in the right column.
BE CAREFUL: Don't plug in very much content for these - there's just not much space.
Page ID Note:
Every page has a page ID (sec_id). If you 'preview' a page you'll see its page id in the url - the page will end with something like:
&sec_id=12345 where 12345 is the page id.