Bud,
I have usually put mine in the sidebar like Sean’s example. But I saw something the other day that made me think.
On my longer blog posts, I might even offer a PDF version of the post for the lead magnet. It seems to me that some of your material might be perfect for that.
“I know, I know… This is a really long article. Click here to get a PDF version to read later.”
You could put that in the sidebar, in the middle of the article, or at the bottom.
Mark