If you're looking to place a block anywhere inside your content, simply do the following:
go to /admin/build/block
select the block you want to insert into your content to get the proper block references...
e.g. I created a custom views block called "latest_news" which, if you click it's url looks like:
so basically, you'll use "views" at the beginning of the function reference and "latest_news-block" at the end:
Drupal 7 method