I show multiple posts or excerpts when people look at my posts.

I would prefer to have a few of these posts appear as a single post on the page - no other posts below it.

Is this possible in some easy fashion?

do you mean that you would like to somehow tag a post so that ..say it was the fifth post and you allow 10 posts per page, you would only see 3 posts and then get the navigation. so you go to the older posts and now just see that one post and igf you go to 'older posts, now you would see 10 posts.

Is this what you are looking for?

No, but I fixed it using additional categories to keep those posts on separate pages instead of consecutive.