That being said, I think all other kinds of texts should be as story-like as possible, in the sense that they should be gripping and interesting from the very first sentence -- I want to be a little bit lost and not know where exactly the writer is taking me. In this case, I really like the idea of jumping straight into a scenario (or anecdote), I remember having been suggested by my teachers in middle school to do so. Having opened the text with a scenario, you can also use it in the conclusion to wrap things up and let the reader know how the story ended, given the conclusions reached in the body of the text.
My book recommendation is "How to write a sentence (and how to read one)", http://www.brainpickings.org/index.php/2011/01/27/how-to-wri... It has whole chapters on both first and last sentences.